How to Evaluate a Students Peer Review Response - Sample Essay

How to Evaluate a Student's Peer Review Response - Sample EssayWriting a sample essay or a student's peer review response is an important part of a successful college education. A good grade for a school paper reflects that the essay is well written and well researched. A student is better equipped to answer questions from fellow students about topics which they don't have experience with. Sample essays are one of the best tools you can use in developing these skills.The most common and effective form of essay samples is a quick one-page essay. The most popular format for writing these types of essays is for students to write their personal statement. This is basically an introductory paragraph for the essay.Since students are often asked to write about several different topics, it is important to make sure that your topic is one that you are familiar with. Sometimes a student is asked to write a half-page or one-page essay on a current issue, but in order to get all of this informat ion out in a short space of time, you may want to consider having the student write an essay in word documents. Your student can then edit the paper and cross-out sections that he or she feels are no longer relevant to the topic.If you have already received a student's paper for peer review response, this is where you will find a sample of their essay. For this reason, it is important to provide students with feedback on their samples so that they will know what kind of comments they should make about the essay.Before you send a student's paper to the editor, you should give them the option to send a paper for peer review response instead of a final assignment. There is nothing wrong with receiving your student's paper for peer review response, but it is often difficult to take into account the ideas they propose. You may want to ask your students to write a review essay or research paper instead. This is an opportunity for your students to show their writing capabilities and hone t heir skills.You may also want to provide students with an opportunity to add an 'instructions' section to their student's peer review response. This can be either a list of instructions that your student should follow or they can include some bits of advice that they feel they need to include. As you discuss your student's essay with the other editors, it is very important to remember that you are reviewing the essay, not the student. While you are the one reading the paper, it is important to make sure that your review includes a balanced perspective and you are providing a professional opinion.In addition to reviewing and evaluating the essay, you should also review the paper's grammar and spelling. If you spot any mistakes or inconsistencies that are not present in the essay as a whole, you should contact the student immediately and provide them with advice on how to correct the mistakes.

The heat given out by different types of primary alcohols Essay Example

The heat given out by different types of primary alcohols Essay In my investigation I will measure the heat given out by different types of primary alcohols when combusting with oxygen and compare the difference in the energy out put per mole of different alcohols.HypothesesBefore we can have a look at the heat content of the different alcohols, we must be able to understand the process of combustion, the changes of the energy within the system while combusting with oxygen and how to determine the difference of the energy given out per unit.First it is crucial to know that it is the external energy that we are measuring of the system, because as the Second Law of thermodynamics states that heat cannot be completely converted into work without some part of the system undergoing change, a equation is applied to the law illustrates that H (total heat content) = G (free energy) + TS (temperatureà ¯Ã‚ ¿Ã‚ ½entropy, TS is the unfree energy which is associated with the degree of disorder of the system), and H can only be equal to G when TS=0 which only takes place at the temperature of absolute zero.We therefore cannot measure the total change in enthalpy (total heat content) since the 3rd law of thermodynamics states that absolute zero cannot be reached; the entropy which measures the degree of disorder also increases spontaneously that the particles of the system become disorderer or more random. What this investigation measures is the spontaneous change in the free energy which is converted into heat as stated in the second law of thermodynamics.Then it is necessary to know that the reaction is exothermic that is heat or in another word kinetic energy and light energy, which is the emission given out when the exited electron return to a lower energy levels, are given out to the surroundings causing the surroundings to gain more kinetic energy and rise in temperature. We can measure the different values of the bond energy of the reactants and the variation between the two values, if the value of variation is positive i.e. when energy is gained the reaction is endothermic, but if the value appears to be negative, then the reaction is exothermic. It is possible to calculate the average bond energy measured in kilo joules per mole (DH/KJ mol-1) and determine the variation. Knowing that C-H=413; C-O=336; C==O=805; H-O=464; O==O=498.3 and the following equation it is possible to calculate ?E.2CH3 (OH) +3O2= 2CO2 +4H2O(413à ¯Ã‚ ¿Ã‚ ½3+336+464)à ¯Ã‚ ¿Ã‚ ½2+498.3à ¯Ã‚ ¿Ã‚ ½3-805à ¯Ã‚ ¿Ã‚ ½2à ¯Ã‚ ¿Ã‚ ½2-464à ¯Ã‚ ¿Ã‚ ½2à ¯Ã‚ ¿Ã‚ ½4=-1359.1 KJ, thus the reaction is exothermic. And since the reactions of other alcohols are similar then we can say that the other alcohol combustions are exothermic.Another fact that we must know is that the end products of any combustion reaction are carbon dioxide and water, but before the new molecules can be formed, a certain energy level is needed to give sufficient energy for the collision by what means that if the energy is not sufficient or incorrectly orientated the react ants will not form, sufficient energy that is needed to be reached is the activation energy of the system to form the activated complex that the atoms are separated.From the state of transition the particles in the molecules now attract to particles of opposite charge, and the orbital become over lapped that the some electrons of the orbital in the outer shell are influenced by both nuclei and therefore forms the molecular orbital (M.O.), and the electrons occupies the orbital whose energy is the lowest available to it. The filling of electrons to the M.O. i.e. the orbital in the sub-shells of the shells are filled up with electrons leads to the drop in energy level of the electrons which can also be called bond energy since it is the energy needed for the transition of energy level of the electrons. This can also be regarded as spontaneous change of the system that it tend to a minimum in potential energy, because the first law of thermodynamics states that energy can neither be cr eated nor destroyed but is simply transferred from one form or system another, the decrease in the energy level of the electrons must mean that energy is transferred to the surroundings.From the information above I can now decide that the energy released per mole is determine by the decrease in energy level of the electrons of the valence shell spontaneously and the number of M.O. When there are more carbon atoms with in an alcohol, there will be more hydrogen atoms within the molecule as well, so that when the new molecules are formed there will be more M.O. of the similar sort formed and more energy will be released, according to the theories I have explained above.If we know the value of the reduction in the energy level when the M.O. are formed (the bond energy), the symbol equation of the reactions and the relative atomic mass (R.A.M.), then it is possible to calculate the energy given out per mole. I will work out the energy released per mole and I would expect the result of m y experiment follow a similar pattern of increase of the set of values below. As we already knew, C-H=413; C-O=336; C==O=805; H-O=464; O==O=498.3; C-C=347Methanol: 2CH3OH+3O2= 2CO2 +4H2O(413à ¯Ã‚ ¿Ã‚ ½3+336+464)à ¯Ã‚ ¿Ã‚ ½2+498.3à ¯Ã‚ ¿Ã‚ ½3-805à ¯Ã‚ ¿Ã‚ ½2à ¯Ã‚ ¿Ã‚ ½2-464à ¯Ã‚ ¿Ã‚ ½2à ¯Ã‚ ¿Ã‚ ½4=-1359.1 kJ; 1359.1?2=679.55kJ mol-1Ethanol: C2H5OH+3O2=2CO2+3H2O347+413à ¯Ã‚ ¿Ã‚ ½5+336+464+3à ¯Ã‚ ¿Ã‚ ½498.3-(805à ¯Ã‚ ¿Ã‚ ½2)à ¯Ã‚ ¿Ã‚ ½2-(464à ¯Ã‚ ¿Ã‚ ½2)à ¯Ã‚ ¿Ã‚ ½= -1297.1kJ1297.1à ¯Ã‚ ¿Ã‚ ½1=1297.1 kJ mol-1Propan-1-ol: 2C3H7OH+9O2=6CO2+8H2O(347à ¯Ã‚ ¿Ã‚ ½2+413à ¯Ã‚ ¿Ã‚ ½7+336+464)à ¯Ã‚ ¿Ã‚ ½2+498.3à ¯Ã‚ ¿Ã‚ ½9-805à ¯Ã‚ ¿Ã‚ ½2à ¯Ã‚ ¿Ã‚ ½6-464à ¯Ã‚ ¿Ã‚ ½2à ¯Ã‚ ¿Ã‚ ½8= -3829.3kJ3829.3à ¯Ã‚ ¿Ã‚ ½2=1914.65 kJ mol-1Butan-1-ol: C4H9OH+6O2=4CO2+5H2O347à ¯Ã‚ ¿Ã‚ ½3+413à ¯Ã‚ ¿Ã‚ ½9+336+464+498.3à ¯Ã‚ ¿Ã‚ ½6-805à ¯Ã‚ ¿Ã‚ ½2à ¯Ã‚ ¿Ã‚ ½4-464à ¯Ã‚ ¿Ã‚ ½2à ¯Ã‚ ¿Ã‚ ½5= -2532.2kJ2532.2à ¯Ã‚ ¿Ã‚ ½1=2532.2kJ mol-1From these set of results it is possible to predict that as the number of carbon atoms increases within an alcohol molecule, the energy out put per mole will also increase.Safety* Alcohols are highly flammable so that the spirit burners must be dealt with caution, any alcohol spillages on any surfaces must be cleaned immediately in case of fire.* Alcohols can cause blindness and death when took into the body, one must seek medical attention when took in.* Avoid touching the apparatus directly after experiments, when which will be heated up.* The flame must be kept distance away from other unnecessary apparatus.* Safety goggles and lab coats must be worn, and first aid kits and other first aid equipments must be ready in case of emergencies. (See photo 4)Apparatus* Spirit burner containing methanol, ethanol, propanol-1-ol and butanol-1-ol* Stand, boss and clamp* Thermometer* Digital balance accurate to 10-2 digits* Ruler* 2à ¯Ã‚ ¿Ã‚ ½100ml2 measuring cylinder* Safety goggles, lab coats* Stop clock* Tin can* Heat proof mat(See photo 1)Method In order to carry out this investigation, two measurements must be taken; they are the loss in the weight of the alcohols, and the temperature change of the water. Subsequently before we can start the experiment we must measure the weight of the spirit burner, and record the reading. Then the stand boss and the clamp should be set up to fix the tin in place. The reason why I have chosen the tin to be the calorimeter is because it is a good conductor to heat thus it has a relatively low heat capacity, and more kinetic energy can be passed to the water molecules efficiently to make accurate my results.The spirit burner should be positioned directly beneath the tin and a heat proof mat is needed to be placed under the spirit burner. The distance between the peak of the wick and the bottom of the tin must be kept constant in order to carry out a fair comparison. A draught shield is needed to be placed around the spirit burner and the tin to prevent the unnecessary heat loss that could v ary the result of the experiment. (See photo 2) After the apparatus have been set up as described above, then we must measure 200ml of water of 2à ¯Ã‚ ¿Ã‚ ½100ml measuring cylinder and add which to the tin, and then place the thermometer to the water and wait until the reading is stable. It important to keep the volume of water constant since the energy required to raise 1oc is associated with the mass.This stable reading can give the actual temperature before the experiment and this also tells me the temperature of the tin since the one have higher energy tends to give out energy spontaneously and equilibrium can be reached between the two. Knowing the heat capacity of the tin it is possible to calculate how much energy the calorimeter receives and this can give me a more accurate value of the heat generated by the alcohol. Since equilibrium can be reached by energy transfer from a hotter system to a colder, I can therefor say that the temperature of the tin can is almost the same as the water. Now that knowing the heat capacity of the calorimeter system which is 0.277 kJ m3 oc and the weight of the tin can is 40.937g, then the energy that had been absorbed in each of the experiments can be calculated.After the preparations it is time to start the experiment by lighting the spirit burner thought the hole in the draught shield using a stick. The experiment will be carried out for approximately 180 seconds, the time is set upon the preliminary work I have done that this could prevent the maximum evaporation of water while efficient energy can be gained by the water to show a positive result. The reading from the thermometer must be taking quite exactly the same time when the flame extinguishes so that an accurate value can result that further out put of energy that will not be taken into account can be avoided.The spirit burner must also be weighed immediately to give a result as accurate as possible, since the weight can be reduced from other ways such as eva poration. The experiment of each alcohol will be carried out 3 times to give an accurate result and the same experiment will be repeated for each alcohol. Between each experiment it is necessary to clean off the carbon as the result of incomplete combustion produced at the bottom of the tin, because it can act as an insulator which will have effects on the accuracy of the results. One other of the natures of combustions is that the flame is not stable and within a flame the distribution of heat is not equal.Consequently it must me made sure that the sizes of the flames are the same since the distance between the wick and the tin can is already at constant. A difference between the cotton part, which is the interior of the wick, and the exterior material can cause a difference in the size of the flame, thus I have decided to cut the wick before each experiment to maintain the size of the flames. (See Photo 3) At this point it is vital to point out that the range of alcohol used be li mited within the primary alcohols, which all have similar molecular structures in terms of the arrangement, so that methanol, ethanol, propan-1-ol and butan-1-ol are used. I also felt that there is no significance in caring out the experiment further that pentan-1-ol and hexan-1-ol are necessary, since I can discover the pattern from the first four.Fair testIn the table below I will illustrate the thing that I will keep constant and that will vary to produce results of use.VariablesConstantsType of primary alcoholVolume of waterApproximately the same timeDistance between the top of spirit burner and the bottom of tinApproximately the same surface area of tin covered by the draught shieldWickThe same calorimeterResults:(See table 1, 2, 3 and graph 1, 2,3)Analysis:By looking a Graph 1, it is possible to see the correlation between the number of carbon atoms and the energy output per mole. The correlation had illustrated that both the expected values and observed values are positive, h ow ever the expected values increase steadily with a high gradient than the values of the experiment. The outcome was expected and the cause had already been explained in the hypothesis. First by nature it is not possible to make 100% use from the energy given out by the reaction, because the energy given is mainly in the form of heat, the movement of particles that can be lost very easily.Evidence have also shown that the combustion is not complete because carbon, one of the activated complex in the process of the reaction had not been combined with oxygen forming carbon dioxide, thus less energy is produced by the reaction due to the incomplete combustion; the amount of carbon collected at the bottom of the tin can had increased as the alcohols containing more carbon was used, showing that more of the combustion/reaction was incomplete when the time for each spirit burner to combust was roughly 180 seconds.From graph 1 along, it is difficult to identify the anomalies due to its sc ale, thus the observed results had been put onto a new graph. (See graph 3) From the graph it is then possible to see that there is no anomalies in the experiment since the line of best fit goes through the error bars of the plotted points on the graph, the error bars represented the possible variation of data due to the inaccuracies experiment. But when looking at graph 2, the percentage of accuracy decreases as the number of carbon increases, butan-1-ol in particular had an anomalous value. If one of the values of the data in the percentage/accuracy graph is anomalous, then this value must also be at the wrong position in the energy output/carbon atoms graph, however there is not enough evident to investigate further.The characteristics of this calorimeter system only allows us to measure the heat transfer from one system to another, however heat was not the only product of the reaction that a relatively large part of the energy is in the forms of light, which cannot be measured b y the calorimeter system. However the difference in the gradient of the two lines of best fit had shown that they increase at different rates, i.e. there are errors in the last experiments which had made the rate of increase of the observed values differ from the expected.The percentage of accuracy of the results obtain from the experiment is shown on graph 2. From which it is clear that the results became less accurate as the chain of carbons got longer, in theory the molecule will increase its activation energy as the number of carbon atoms increases because each carbon atom have 4 half full sub-shells, since the electrons follow the Hund principle which states that when filling a sub-shell, there is less electron repulsion if each of each orbital is half-filled first before any single one is completely filled.In the M shell of carbon, 2s, 2px, 2py and 2pz orbital are half filled of that the 4 unpaired electrons can attract 4 other nuclei, thus the more carbon there is the half fi lled orbital there are. Again, as I had stated in my prediction that the energy level, the potential energy in particular of the electrons will drop, when an orbital is full, therefore more energy is required to provide sufficient energy i.e. bring back the initial energy level of the electrons for collision to occur properly. The more carbon atoms there are, the fuller orbital thus larger amount of energy will fall. The higher activation energy made difficult the supply of which, thus a larger amount is combusted improperly, and this can then explain the decrease in percentage of accuracy.Equally if there are more carbon atoms in the reactants, more products will form, and I had already investigated in my prediction that the reaction is exothermic, i.e. the energy given by the products is higher than the energy put in to the system due to the characteristics of different types of bonds. In this case, there are more bonds in the products, although the type of bonding may be differen t (? and ? bonds) that they have different energy levels.From my results it is possible of see that as the number of carbon atoms increased in a primary alcohol molecule, the energy output of it also increases. This had matched my prediction although the pattern between the expected and the observed is different.Evaluation:The results had shown a positive correlation between the set of results, however the results had also shown that the experiment did not accurately measure the energy output of the alcohols on graph 1. However there is potential to make more accurate the experiment by using method that could prevent as much heat loss as possible.Before it is possible to make further improvements on the investigation, probable errors must be identified and analyzed. It would consolidated my conclusion, in witch the particular errors are unidentified, if I had more evidence about the trend in the deduction of the percentage of accuracy, thus I would be a good idea to obtain the value s of pentan-1-ol and hexan-1-ol. However if the equipments such as a variety of alcohols are not available, then more accurate methods can my applied to the current investigation to reduce the probability of anomalies occurring.First the heat produced by the reaction is not efficiently used to heat up the water, which can cause potential inaccuracies; some heat is lost to the surroundings and not taking in by water, because some would be conducted away by the apparatus e.g. the tin can some would be absorbed by the cylinder (not include in the calculation) and some lost through convection or move spontaneously to where air molecules have less energy due to nature. To solve the problem black painted tin cans which is able to absorb the maximum radiation given, and the infra red waved are able to heat up the water molecules. Yet not all part of the tin should be painted black, the inside and the outside of the sides of the tin can must maintain its shiny colour to prevent radiation gi ven out by the heated up tin can.Some sort of insulation of the tin can is also able to avoid heat lost through conduction, consequently the tin can should be wrapped with wools to preserve the heat within. The apparatus that are purposed to preserve the heat are not all ideal, the cylinder used to increase the heat given to tin can should have had a higher heat capacity, because the draught shield was heated up but the large amount of energy, due to the large change in temperature, cannot and was not calculated. It would possibly be a good idea to use a better insulated draught shield, so that it would also by wrapped with wools and coated with silver paint to reduce conduction and radiation to the minimal. An enclosed and well insulated chamber can also increase the efficiency of the usage of the energy, by bring to a close the escape of the heat.Many other faults were caused by ineffectual apparatus. The hole that was used to light spirit burner acted as a drought, which provided oxygen which is an element in the equation of combustion, but this also had made the flame unstable due to the movement of the air. The thermometer was accurate 0.5 oC which could impact the final result, if the thermometer was accurate to 10-2 the results would be more accurate and more reliable. The shielding that are purposed to prevent heat loss can impede the process of putting off the flame, therefore the change in mass did not match the reading of the thermometer when taken, and the level of heat with in the chamber will not be consistent through out the experiment when attempting to distinguish the flame by capping the burner. This problem would be very difficult to solve that it would be difficult to have an enclosed system to prevent heat loss and to ensure that the flame can be distinguished easily.One other cause of error of my experiment was that the alcohols are not completely combusted because the activation energy cannot be reached when only little partition of the alcohols in the spirit burner are being burnt and not producing enough energy for efficient collision between particles so that carbon atoms are formed at the bottom of the tin can. The building up of the carbon also acted as an insulator that the heat cannot be conducted to the tin can and will impact on the results of my experiment. Again this is a problem that I have to face when the experiment is repeated, although the carbon can be displace after each experiment, but the effect of which during the experiment cannot be solved.Now that I think it is appropriate to introduce a different method which would guarantee the energy of the reaction can be accurately measured. In the current experiment heat loss to the surroundings and therefore the energy towards the water was not efficient, but if the surroundings, where heat is given to, is water then maximum percentage of energy released by the experiment would be given to water where it can be measured. The error occurred in measurin g the mass was also a factor affecting the anomalous results, thus a given mass can be allowed to be completely combusted so that an accurate value can be obtained.Some of the energy given to water are lost, or transferred to the surrounding of the calorimeter which cannot be measured, the heat is transferred is because one system has more energy than the other. Knowing this if the calorimeter can be maintained at the same temperature as the water with, no heat transfer can occur through conduction, and when the calorimeter is concealed no further heat can escape by convection. In order to reduce radiation, as described above, the calorimeter can be coated in shiny colour. Rather than preceding the experiment in a spirit burner, where only a little mass of alcohol was being burnt which could not proved efficient energy output that the wrong proportion of which could be used to provide the efficiency for collision, and result in incomplete combustion.A larger mass could be burnt in a given length of time to produce more energy to secure further efficiency in collision. The appropriate apparatus which suites the description above would be a bomb calorimeter. (See diagram 1) The combustion would take place in the bomb where is cased with steel, which could with stand the impact of the explosion when alcohol being combusted and also conduct heat to the calorimeter. Within the bomb the reaction is triggered by a fuse-wire which is conducted to the mains, the fuse then burns the cotton attached to it and light the flame.The bomb is also well supplied with 25 atmosphere of oxygen, pumped in with a pipe, thus no draught is need. The bomb then will be placed in a calorimeter system filled with water, as stated above that maximum energy can be transferred in the water which can then be measured, the wall of this calorimeter will be filled with water and the temperature of which is controlled by a coil which equalizes the temperature so that heat cannot can not escape or get into the calorimeter. Because the heat cannot be transferred in or out of the calorimeter, the maximum temperature the system reaches would be almost, if not all the free energy of the reaction.As well as to discover the pattern among the primary alcohols, secondary and tertiary alcohols can also be investigated. We already know the relationship between the numbers of carbon atoms or the length of the carbon chain and the energy output, it would be equally significant to learn the science when the carbons are not in a chain or a irregular chain, and how a hybridized carbon if any at all is able to alter the results. Investigations could be among propan-2-ol, butan-2-ol, pentan-2-ol, hexan-2-ol, cyclohexanol and 2-methyl-propan-2-ol. The heat given out by different types of primary alcohols Essay Example The heat given out by different types of primary alcohols Essay In my investigation I will measure the heat given out by different types of primary alcohols when combusting with oxygen and compare the difference in the energy out put per mole of different alcohols.HypothesesBefore we can have a look at the heat content of the different alcohols, we must be able to understand the process of combustion, the changes of the energy within the system while combusting with oxygen and how to determine the difference of the energy given out per unit.First it is crucial to know that it is the external energy that we are measuring of the system, because as the Second Law of thermodynamics states that heat cannot be completely converted into work without some part of the system undergoing change, a equation is applied to the law illustrates that H (total heat content) = G (free energy) + TS (temperatureà ¯Ã‚ ¿Ã‚ ½entropy, TS is the unfree energy which is associated with the degree of disorder of the system), and H can only be equal to G when TS=0 which only takes place at the temperature of absolute zero.We therefore cannot measure the total change in enthalpy (total heat content) since the 3rd law of thermodynamics states that absolute zero cannot be reached; the entropy which measures the degree of disorder also increases spontaneously that the particles of the system become disorderer or more random. What this investigation measures is the spontaneous change in the free energy which is converted into heat as stated in the second law of thermodynamics.Then it is necessary to know that the reaction is exothermic that is heat or in another word kinetic energy and light energy, which is the emission given out when the exited electron return to a lower energy levels, are given out to the surroundings causing the surroundings to gain more kinetic energy and rise in temperature. We can measure the different values of the bond energy of the reactants and the variation between the two values, if the value of variation is positive i.e. when energy is gained the reaction is endothermic, but if the value appears to be negative, then the reaction is exothermic. It is possible to calculate the average bond energy measured in kilo joules per mole (DH/KJ mol-1) and determine the variation. Knowing that C-H=413; C-O=336; C==O=805; H-O=464; O==O=498.3 and the following equation it is possible to calculate ?E.2CH3 (OH) +3O2= 2CO2 +4H2O(413à ¯Ã‚ ¿Ã‚ ½3+336+464)à ¯Ã‚ ¿Ã‚ ½2+498.3à ¯Ã‚ ¿Ã‚ ½3-805à ¯Ã‚ ¿Ã‚ ½2à ¯Ã‚ ¿Ã‚ ½2-464à ¯Ã‚ ¿Ã‚ ½2à ¯Ã‚ ¿Ã‚ ½4=-1359.1 KJ, thus the reaction is exothermic. And since the reactions of other alcohols are similar then we can say that the other alcohol combustions are exothermic.Another fact that we must know is that the end products of any combustion reaction are carbon dioxide and water, but before the new molecules can be formed, a certain energy level is needed to give sufficient energy for the collision by what means that if the energy is not sufficient or incorrectly orientated the react ants will not form, sufficient energy that is needed to be reached is the activation energy of the system to form the activated complex that the atoms are separated.From the state of transition the particles in the molecules now attract to particles of opposite charge, and the orbital become over lapped that the some electrons of the orbital in the outer shell are influenced by both nuclei and therefore forms the molecular orbital (M.O.), and the electrons occupies the orbital whose energy is the lowest available to it. The filling of electrons to the M.O. i.e. the orbital in the sub-shells of the shells are filled up with electrons leads to the drop in energy level of the electrons which can also be called bond energy since it is the energy needed for the transition of energy level of the electrons. This can also be regarded as spontaneous change of the system that it tend to a minimum in potential energy, because the first law of thermodynamics states that energy can neither be cr eated nor destroyed but is simply transferred from one form or system another, the decrease in the energy level of the electrons must mean that energy is transferred to the surroundings.From the information above I can now decide that the energy released per mole is determine by the decrease in energy level of the electrons of the valence shell spontaneously and the number of M.O. When there are more carbon atoms with in an alcohol, there will be more hydrogen atoms within the molecule as well, so that when the new molecules are formed there will be more M.O. of the similar sort formed and more energy will be released, according to the theories I have explained above.If we know the value of the reduction in the energy level when the M.O. are formed (the bond energy), the symbol equation of the reactions and the relative atomic mass (R.A.M.), then it is possible to calculate the energy given out per mole. I will work out the energy released per mole and I would expect the result of m y experiment follow a similar pattern of increase of the set of values below. As we already knew, C-H=413; C-O=336; C==O=805; H-O=464; O==O=498.3; C-C=347Methanol: 2CH3OH+3O2= 2CO2 +4H2O(413à ¯Ã‚ ¿Ã‚ ½3+336+464)à ¯Ã‚ ¿Ã‚ ½2+498.3à ¯Ã‚ ¿Ã‚ ½3-805à ¯Ã‚ ¿Ã‚ ½2à ¯Ã‚ ¿Ã‚ ½2-464à ¯Ã‚ ¿Ã‚ ½2à ¯Ã‚ ¿Ã‚ ½4=-1359.1 kJ; 1359.1?2=679.55kJ mol-1Ethanol: C2H5OH+3O2=2CO2+3H2O347+413à ¯Ã‚ ¿Ã‚ ½5+336+464+3à ¯Ã‚ ¿Ã‚ ½498.3-(805à ¯Ã‚ ¿Ã‚ ½2)à ¯Ã‚ ¿Ã‚ ½2-(464à ¯Ã‚ ¿Ã‚ ½2)à ¯Ã‚ ¿Ã‚ ½= -1297.1kJ1297.1à ¯Ã‚ ¿Ã‚ ½1=1297.1 kJ mol-1Propan-1-ol: 2C3H7OH+9O2=6CO2+8H2O(347à ¯Ã‚ ¿Ã‚ ½2+413à ¯Ã‚ ¿Ã‚ ½7+336+464)à ¯Ã‚ ¿Ã‚ ½2+498.3à ¯Ã‚ ¿Ã‚ ½9-805à ¯Ã‚ ¿Ã‚ ½2à ¯Ã‚ ¿Ã‚ ½6-464à ¯Ã‚ ¿Ã‚ ½2à ¯Ã‚ ¿Ã‚ ½8= -3829.3kJ3829.3à ¯Ã‚ ¿Ã‚ ½2=1914.65 kJ mol-1Butan-1-ol: C4H9OH+6O2=4CO2+5H2O347à ¯Ã‚ ¿Ã‚ ½3+413à ¯Ã‚ ¿Ã‚ ½9+336+464+498.3à ¯Ã‚ ¿Ã‚ ½6-805à ¯Ã‚ ¿Ã‚ ½2à ¯Ã‚ ¿Ã‚ ½4-464à ¯Ã‚ ¿Ã‚ ½2à ¯Ã‚ ¿Ã‚ ½5= -2532.2kJ2532.2à ¯Ã‚ ¿Ã‚ ½1=2532.2kJ mol-1From these set of results it is possible to predict that as the number of carbon atoms increases within an alcohol molecule, the energy out put per mole will also increase.Safety* Alcohols are highly flammable so that the spirit burners must be dealt with caution, any alcohol spillages on any surfaces must be cleaned immediately in case of fire.* Alcohols can cause blindness and death when took into the body, one must seek medical attention when took in.* Avoid touching the apparatus directly after experiments, when which will be heated up.* The flame must be kept distance away from other unnecessary apparatus.* Safety goggles and lab coats must be worn, and first aid kits and other first aid equipments must be ready in case of emergencies. (See photo 4)Apparatus* Spirit burner containing methanol, ethanol, propanol-1-ol and butanol-1-ol* Stand, boss and clamp* Thermometer* Digital balance accurate to 10-2 digits* Ruler* 2à ¯Ã‚ ¿Ã‚ ½100ml2 measuring cylinder* Safety goggles, lab coats* Stop clock* Tin can* Heat proof mat(See photo 1)Method In order to carry out this investigation, two measurements must be taken; they are the loss in the weight of the alcohols, and the temperature change of the water. Subsequently before we can start the experiment we must measure the weight of the spirit burner, and record the reading. Then the stand boss and the clamp should be set up to fix the tin in place. The reason why I have chosen the tin to be the calorimeter is because it is a good conductor to heat thus it has a relatively low heat capacity, and more kinetic energy can be passed to the water molecules efficiently to make accurate my results.The spirit burner should be positioned directly beneath the tin and a heat proof mat is needed to be placed under the spirit burner. The distance between the peak of the wick and the bottom of the tin must be kept constant in order to carry out a fair comparison. A draught shield is needed to be placed around the spirit burner and the tin to prevent the unnecessary heat loss that could v ary the result of the experiment. (See photo 2) After the apparatus have been set up as described above, then we must measure 200ml of water of 2à ¯Ã‚ ¿Ã‚ ½100ml measuring cylinder and add which to the tin, and then place the thermometer to the water and wait until the reading is stable. It important to keep the volume of water constant since the energy required to raise 1oc is associated with the mass.This stable reading can give the actual temperature before the experiment and this also tells me the temperature of the tin since the one have higher energy tends to give out energy spontaneously and equilibrium can be reached between the two. Knowing the heat capacity of the tin it is possible to calculate how much energy the calorimeter receives and this can give me a more accurate value of the heat generated by the alcohol. Since equilibrium can be reached by energy transfer from a hotter system to a colder, I can therefor say that the temperature of the tin can is almost the same as the water. Now that knowing the heat capacity of the calorimeter system which is 0.277 kJ m3 oc and the weight of the tin can is 40.937g, then the energy that had been absorbed in each of the experiments can be calculated.After the preparations it is time to start the experiment by lighting the spirit burner thought the hole in the draught shield using a stick. The experiment will be carried out for approximately 180 seconds, the time is set upon the preliminary work I have done that this could prevent the maximum evaporation of water while efficient energy can be gained by the water to show a positive result. The reading from the thermometer must be taking quite exactly the same time when the flame extinguishes so that an accurate value can result that further out put of energy that will not be taken into account can be avoided.The spirit burner must also be weighed immediately to give a result as accurate as possible, since the weight can be reduced from other ways such as eva poration. The experiment of each alcohol will be carried out 3 times to give an accurate result and the same experiment will be repeated for each alcohol. Between each experiment it is necessary to clean off the carbon as the result of incomplete combustion produced at the bottom of the tin, because it can act as an insulator which will have effects on the accuracy of the results. One other of the natures of combustions is that the flame is not stable and within a flame the distribution of heat is not equal.Consequently it must me made sure that the sizes of the flames are the same since the distance between the wick and the tin can is already at constant. A difference between the cotton part, which is the interior of the wick, and the exterior material can cause a difference in the size of the flame, thus I have decided to cut the wick before each experiment to maintain the size of the flames. (See Photo 3) At this point it is vital to point out that the range of alcohol used be li mited within the primary alcohols, which all have similar molecular structures in terms of the arrangement, so that methanol, ethanol, propan-1-ol and butan-1-ol are used. I also felt that there is no significance in caring out the experiment further that pentan-1-ol and hexan-1-ol are necessary, since I can discover the pattern from the first four.Fair testIn the table below I will illustrate the thing that I will keep constant and that will vary to produce results of use.VariablesConstantsType of primary alcoholVolume of waterApproximately the same timeDistance between the top of spirit burner and the bottom of tinApproximately the same surface area of tin covered by the draught shieldWickThe same calorimeterResults:(See table 1, 2, 3 and graph 1, 2,3)Analysis:By looking a Graph 1, it is possible to see the correlation between the number of carbon atoms and the energy output per mole. The correlation had illustrated that both the expected values and observed values are positive, h ow ever the expected values increase steadily with a high gradient than the values of the experiment. The outcome was expected and the cause had already been explained in the hypothesis. First by nature it is not possible to make 100% use from the energy given out by the reaction, because the energy given is mainly in the form of heat, the movement of particles that can be lost very easily.Evidence have also shown that the combustion is not complete because carbon, one of the activated complex in the process of the reaction had not been combined with oxygen forming carbon dioxide, thus less energy is produced by the reaction due to the incomplete combustion; the amount of carbon collected at the bottom of the tin can had increased as the alcohols containing more carbon was used, showing that more of the combustion/reaction was incomplete when the time for each spirit burner to combust was roughly 180 seconds.From graph 1 along, it is difficult to identify the anomalies due to its sc ale, thus the observed results had been put onto a new graph. (See graph 3) From the graph it is then possible to see that there is no anomalies in the experiment since the line of best fit goes through the error bars of the plotted points on the graph, the error bars represented the possible variation of data due to the inaccuracies experiment. But when looking at graph 2, the percentage of accuracy decreases as the number of carbon increases, butan-1-ol in particular had an anomalous value. If one of the values of the data in the percentage/accuracy graph is anomalous, then this value must also be at the wrong position in the energy output/carbon atoms graph, however there is not enough evident to investigate further.The characteristics of this calorimeter system only allows us to measure the heat transfer from one system to another, however heat was not the only product of the reaction that a relatively large part of the energy is in the forms of light, which cannot be measured b y the calorimeter system. However the difference in the gradient of the two lines of best fit had shown that they increase at different rates, i.e. there are errors in the last experiments which had made the rate of increase of the observed values differ from the expected.The percentage of accuracy of the results obtain from the experiment is shown on graph 2. From which it is clear that the results became less accurate as the chain of carbons got longer, in theory the molecule will increase its activation energy as the number of carbon atoms increases because each carbon atom have 4 half full sub-shells, since the electrons follow the Hund principle which states that when filling a sub-shell, there is less electron repulsion if each of each orbital is half-filled first before any single one is completely filled.In the M shell of carbon, 2s, 2px, 2py and 2pz orbital are half filled of that the 4 unpaired electrons can attract 4 other nuclei, thus the more carbon there is the half fi lled orbital there are. Again, as I had stated in my prediction that the energy level, the potential energy in particular of the electrons will drop, when an orbital is full, therefore more energy is required to provide sufficient energy i.e. bring back the initial energy level of the electrons for collision to occur properly. The more carbon atoms there are, the fuller orbital thus larger amount of energy will fall. The higher activation energy made difficult the supply of which, thus a larger amount is combusted improperly, and this can then explain the decrease in percentage of accuracy.Equally if there are more carbon atoms in the reactants, more products will form, and I had already investigated in my prediction that the reaction is exothermic, i.e. the energy given by the products is higher than the energy put in to the system due to the characteristics of different types of bonds. In this case, there are more bonds in the products, although the type of bonding may be differen t (? and ? bonds) that they have different energy levels.From my results it is possible of see that as the number of carbon atoms increased in a primary alcohol molecule, the energy output of it also increases. This had matched my prediction although the pattern between the expected and the observed is different.Evaluation:The results had shown a positive correlation between the set of results, however the results had also shown that the experiment did not accurately measure the energy output of the alcohols on graph 1. However there is potential to make more accurate the experiment by using method that could prevent as much heat loss as possible.Before it is possible to make further improvements on the investigation, probable errors must be identified and analyzed. It would consolidated my conclusion, in witch the particular errors are unidentified, if I had more evidence about the trend in the deduction of the percentage of accuracy, thus I would be a good idea to obtain the value s of pentan-1-ol and hexan-1-ol. However if the equipments such as a variety of alcohols are not available, then more accurate methods can my applied to the current investigation to reduce the probability of anomalies occurring.First the heat produced by the reaction is not efficiently used to heat up the water, which can cause potential inaccuracies; some heat is lost to the surroundings and not taking in by water, because some would be conducted away by the apparatus e.g. the tin can some would be absorbed by the cylinder (not include in the calculation) and some lost through convection or move spontaneously to where air molecules have less energy due to nature. To solve the problem black painted tin cans which is able to absorb the maximum radiation given, and the infra red waved are able to heat up the water molecules. Yet not all part of the tin should be painted black, the inside and the outside of the sides of the tin can must maintain its shiny colour to prevent radiation gi ven out by the heated up tin can.Some sort of insulation of the tin can is also able to avoid heat lost through conduction, consequently the tin can should be wrapped with wools to preserve the heat within. The apparatus that are purposed to preserve the heat are not all ideal, the cylinder used to increase the heat given to tin can should have had a higher heat capacity, because the draught shield was heated up but the large amount of energy, due to the large change in temperature, cannot and was not calculated. It would possibly be a good idea to use a better insulated draught shield, so that it would also by wrapped with wools and coated with silver paint to reduce conduction and radiation to the minimal. An enclosed and well insulated chamber can also increase the efficiency of the usage of the energy, by bring to a close the escape of the heat.Many other faults were caused by ineffectual apparatus. The hole that was used to light spirit burner acted as a drought, which provided oxygen which is an element in the equation of combustion, but this also had made the flame unstable due to the movement of the air. The thermometer was accurate 0.5 oC which could impact the final result, if the thermometer was accurate to 10-2 the results would be more accurate and more reliable. The shielding that are purposed to prevent heat loss can impede the process of putting off the flame, therefore the change in mass did not match the reading of the thermometer when taken, and the level of heat with in the chamber will not be consistent through out the experiment when attempting to distinguish the flame by capping the burner. This problem would be very difficult to solve that it would be difficult to have an enclosed system to prevent heat loss and to ensure that the flame can be distinguished easily.One other cause of error of my experiment was that the alcohols are not completely combusted because the activation energy cannot be reached when only little partition of the alcohols in the spirit burner are being burnt and not producing enough energy for efficient collision between particles so that carbon atoms are formed at the bottom of the tin can. The building up of the carbon also acted as an insulator that the heat cannot be conducted to the tin can and will impact on the results of my experiment. Again this is a problem that I have to face when the experiment is repeated, although the carbon can be displace after each experiment, but the effect of which during the experiment cannot be solved.Now that I think it is appropriate to introduce a different method which would guarantee the energy of the reaction can be accurately measured. In the current experiment heat loss to the surroundings and therefore the energy towards the water was not efficient, but if the surroundings, where heat is given to, is water then maximum percentage of energy released by the experiment would be given to water where it can be measured. The error occurred in measurin g the mass was also a factor affecting the anomalous results, thus a given mass can be allowed to be completely combusted so that an accurate value can be obtained.Some of the energy given to water are lost, or transferred to the surrounding of the calorimeter which cannot be measured, the heat is transferred is because one system has more energy than the other. Knowing this if the calorimeter can be maintained at the same temperature as the water with, no heat transfer can occur through conduction, and when the calorimeter is concealed no further heat can escape by convection. In order to reduce radiation, as described above, the calorimeter can be coated in shiny colour. Rather than preceding the experiment in a spirit burner, where only a little mass of alcohol was being burnt which could not proved efficient energy output that the wrong proportion of which could be used to provide the efficiency for collision, and result in incomplete combustion.A larger mass could be burnt in a given length of time to produce more energy to secure further efficiency in collision. The appropriate apparatus which suites the description above would be a bomb calorimeter. (See diagram 1) The combustion would take place in the bomb where is cased with steel, which could with stand the impact of the explosion when alcohol being combusted and also conduct heat to the calorimeter. Within the bomb the reaction is triggered by a fuse-wire which is conducted to the mains, the fuse then burns the cotton attached to it and light the flame.The bomb is also well supplied with 25 atmosphere of oxygen, pumped in with a pipe, thus no draught is need. The bomb then will be placed in a calorimeter system filled with water, as stated above that maximum energy can be transferred in the water which can then be measured, the wall of this calorimeter will be filled with water and the temperature of which is controlled by a coil which equalizes the temperature so that heat cannot can not escape or get into the calorimeter. Because the heat cannot be transferred in or out of the calorimeter, the maximum temperature the system reaches would be almost, if not all the free energy of the reaction.As well as to discover the pattern among the primary alcohols, secondary and tertiary alcohols can also be investigated. We already know the relationship between the numbers of carbon atoms or the length of the carbon chain and the energy output, it would be equally significant to learn the science when the carbons are not in a chain or a irregular chain, and how a hybridized carbon if any at all is able to alter the results. Investigations could be among propan-2-ol, butan-2-ol, pentan-2-ol, hexan-2-ol, cyclohexanol and 2-methyl-propan-2-ol.

Causes of World War II in the Pacific

Causes of World War II in the Pacific World War II in the Pacific was caused by a number of issues stemming from Japanese expansionism to problems relating to the end of World War I. Japan After World War I A valuable ally during World War I, the European powers and the U.S. recognized Japan as a colonial power after the war. In Japan, this led to the rise of ultra-right wing and nationalist leaders, such as Fumimaro Konoe and Sadao Araki, who advocated uniting Asia under the rule of the emperor. Known as hakkà ´ ichiu, this philosophy gained ground during the 1920s and 1930s as Japan needed increasingly more natural resources to support its industrial growth. With the onset of the Great Depression, Japan moved towards a fascist system with the army exerting growing influence over the emperor and government. To keep the economy growing, an emphasis was placed on arms and weapons production, with much of the raw materials coming from the U.S. Rather than continue this dependence on foreign materials, the Japanese decided to seek out resource-rich colonies to supplement their existing possessions in Korea and Formosa. To accomplish this goal, the leaders in Tokyo looked west to China, which was in the midst of a civil war between Chiang Kai-sheks Kuomintang (Nationalist) government, Mao Zedongs Communists, and local warlords. Invasion of Manchuria For several years, Japan had been meddling in Chinese affairs, and the province of Manchuria in northeast China was seen as ideal for Japanese expansion. On Sept. 18, 1931, the Japanese staged an incident along the Japanese-owned South Manchuria Railway near Mukden (Shenyang). After blowing up a section of track, the Japanese blamed the attack on the local Chinese garrison. Using the Mukden Bridge Incident as a pretext, Japanese troops flooded into Manchuria. The Nationalist Chinese forces in the region, following the governments policy of nonresistance, refused to fight, allowing the Japanese to occupy much of the province. Unable to divert forces from battling the Communists and warlords, Chiang Kai-shek sought aid from the international community and the League of Nations. On Oct. 24, the League of Nations passed a resolution demanding the withdrawal of Japanese troops by Nov. 16. This resolution was rejected by Tokyo and Japanese troops continued operations to secure Manchuria. In January, the U.S. stated that it would not recognize any government formed as a result of Japanese aggression. Two months later, the Japanese created the puppet state of Manchukuo with the last Chinese emperor  Puyi as its leader. Like the U.S., the League of Nations refused to recognize the new state, prompting Japan to leave the organization in 1933. Later that year, the Japanese seized the neighboring province of Jehol. Political Turmoil While Japanese forces were successfully occupying Manchuria, there was political unrest in Tokyo. After a failed attempt to capture Shanghai in January, Prime Minister Inukai Tsuyoshi was assassinated on May 15, 1932  by radical elements of the Imperial Japanese Navy who were angered by his support of the London Naval Treaty and his attempts to curb the militarys power. Tsuyoshis death marked the end of civilian political control of the government until after World War II. Control of the government was given to Admiral SaitÃ…  Makoto. Over the next four years, several assassinations and coups were attempted as the military sought to gain complete control of the government. On Nov. 25, 1936, Japan joined with Nazi Germany and Fascist Italy in signing the Anti-Comintern Pact which was directed against global communism. In June 1937, Fumimaro Konoe became prime minister and, despite his political leanings, sought to curb the militarys power. The Second Sino-Japanese War Begins Fighting between the Chinese and Japanese resumed on a large scale on July 7, 1937, following the Marco Polo Bridge Incident, just south of Beijing. Pressured by the military, Konoe permitted troop strength in China to grow and by the end of the year Japanese forces had occupied Shanghai, Nanking, and southern Shanxi province. After seizing the capital of Nanking, the Japanese brutally sacked the city in late 1937 and early 1938. Pillaging the city and killing nearly 300,000, the event became known as the Rape of Nanking. To combat the Japanese invasion, the Kuomintang and Chinese Communist Party united in an uneasy alliance against the common foe. Unable to effectively confront the Japanese directly in battle, the Chinese traded land for time as they built up their forces and shifted industry from threatened coastal areas to the interior. Enacting a scorched earth policy, the Chinese were able to slow the Japanese advance by mid-1938. By 1940, the war had become a stalemate with the Japanese controlling the coastal cities and railroads and the Chinese occupying the interior and countryside. On Sept. 22, 1940, taking advantage of Frances defeat that summer, Japanese troops occupied French Indochina. Five days later, the Japanese signed the Tripartite Pact effectively forming an alliance with Germany and Italy Conflict With the Soviet Union While operations were ongoing in China, Japan became embroiled in border war with the Soviet Union in 1938. Beginning with the Battle of Lake Khasan (July 29 to Aug. 11, 1938), the conflict was a result of a dispute over the border of Manchu China and Russia. Also known as the Changkufeng Incident, the battle resulted in a Soviet victory and expulsion of the Japanese from their territory. The two clashed again in the larger Battle of Khalkhin Gol (May 11 to Sept. 16, 1939) the following year. Led by General Georgy Zhukov, Soviet forces decisively defeated the Japanese, killing over 8,000. As a result of these defeats, the Japanese agreed to the Soviet-Japanese Neutrality Pact in April 1941. Foreign Reactions to the Second Sino-Japanese War Prior to the outbreak of World War II, China was heavily supported by Germany (until 1938) and the Soviet Union. The latter readily provided aircraft, military supplies, and advisors, seeing China as a buffer against Japan. The U.S., Britain, and France limited their support to war contracts prior to the beginning of the larger conflict. Public opinion, while initially on the side of the Japanese, began to shift following reports of atrocities like the Rape of Nanking. It was further swayed by incidents such as the Japanese sinking of the gunboat U.S.S.  Panay  on Dec. 12, 1937, and increasing fears about Japans policy of expansionism. U.S. support increased in mid-1941, with the clandestine formation of the 1st American Volunteer Group, better known as the Flying Tigers. Equipped with U.S. aircraft and American pilots, the 1st AVG, under Colonel Claire Chennault, effectively defended the skies over China and Southeast Asia from late-1941 to mid-1942, downing 300 Japanese aircraft with a loss of only 12 of their own. In addition to military support, the U.S., Britain, and the Netherlands East Indies initiated oil and steel embargoes against Japan in August 1941. Moving Towards War With the U.S. The American oil embargo caused a crisis in Japan. Reliant on the U.S. for 80 percent of its oil, the Japanese were forced to decide between withdrawing from China, negotiating an end to the conflict, or going to war to obtain the needed resources elsewhere. In an attempt to resolve the situation, Konoe asked U.S.  President Franklin Roosevelt  for a summit meeting to discuss the issues. Roosevelt replied that Japan needed to leave China before such a meeting could be held. While Konoe was seeking a diplomatic solution, the military was looking south to the Netherlands East Indies and their rich sources of oil and rubber. Believing that an attack in this region would cause the U.S. to declare war, they began planning for such an eventuality. On Oct. 16, 1941, after unsuccessfully arguing for more time to negotiate, Konoe resigned as prime minister and was replaced by the pro-military General Hideki Tojo. While Konoe had been working for peace, the Imperial Japanese Navy (IJN) had developed its war plans. These called for a preemptive strike against the U.S. Pacific Fleet at  Pearl Harbor, Hawaii, as well as simultaneous strikes against the Philippines, Netherlands East Indies, and the British colonies in the region. The goal of this plan was to eliminate the American threat, allowing Japanese forces to secure the Dutch and British colonies. The IJNs chief of staff, Admiral Osami Nagano, presented the attack plan to Emperor Hirohito on Nov. 3. Two days later, the emperor approved it, ordering the attack to occur in early December if no diplomatic breakthroughs were achieved. Attack on Pearl Harbor On Nov. 26, 1941, the Japanese attack force, consisting of six aircraft carriers, sailed with Admiral Chuichi Nagumo in command. After being notified that diplomatic efforts had failed, Nagumo proceeded with the attack on Pearl Harbor. Arriving approximately 200 miles north of Oahu on Dec. 7, Nagumo began launching his 350 aircraft. To support the air attack, the IJN had also dispatched five midget submarines to Pearl Harbor. One of these was spotted by the minesweeper U.S.S.  Condor  at 3:42 a.m. outside of Pearl Harbor. Alerted by  Condor, the destroyer U.S.S.  Ward  moved to intercept and sank it around 6:37 a.m. As Nagumos aircraft approached, they were detected by the new radar station at Opana Point. This signal was misinterpreted as a flight of  B-17 bombers  arriving from the U.S. At 7:48 a.m., the Japanese aircraft descended on Pearl Harbor. Using specially modified torpedoes and armor piercing bombs, they  caught the U.S. fleet by complete surprise. Attacking in two waves, the Japanese managed to sink four battleships and badly damaged four more. In addition, they damaged three cruisers, sank two destroyers, and destroyed 188 aircraft. Total American casualties were 2,368 killed and 1,174 wounded. The Japanese lost 64 dead, as well as 29 aircraft and all five midget submarines. In response, the U.S. declared war on Japan on Dec. 8, after  President Roosevelt  referred to the attack as a date which will live in infamy. Japanese Advances Coinciding with the attack on Pearl Harbor were Japanese moves against the Philippines, British Malaya, the Bismarcks, Java, and Sumatra. In the Philippines, Japanese aircraft attacked U.S. and Philippine positions on Dec. 8, and troops began landing on Luzon two days later. Swiftly pushing back  General Douglas MacArthurs Philippine and American forces, the Japanese had captured much of the island by Dec. 23. That same day, far to the east, the Japanese overcame fierce resistance from U.S. Marines to  capture Wake Island. Also on Dec. 8, Japanese troops moved into Malaya and Burma from their bases in French Indochina. To aid British troops fighting on the Malay Peninsula, the Royal Navy dispatched the battleships H.M.S.  Prince of Wales  and  Repulse  to the east coast. On Dec. 10,  both ships were sunk by Japanese air attacks  leaving the coast exposed. Farther north, British and Canadian forces were resisting Japanese  assaults on Hong Kong. Beginning on Dec. 8, the Japanese launched a series of attacks that forced the defenders back. Outnumbered three to one, the British surrendered the colony on Dec. 25.

Arguments Participation Paper 3 Assignment Example | Topics and Well Written Essays - 250 words

Arguments Participation Paper 3 - Assignment Example (lines 17- 24) the mother cries out the guilt and pain of abortion; unborn children are robbed off their basic rights to live and do other common activities during a life time; 3. (lines 30,31) show how the mother tries to convince herself of the abortions; the first part of the poem addresses the mother and the later part addresses the child. It clearly shows how the mother takes abortion very seriously and wants to overcome the guilt and pain associated with it. The loss is even more painful and is clearly portrayed in the first part. The second part convinces of the love the mother had for her aborted children. Characters and their symbolic use: 1. dead person conversing with the poet; this character is imaginary and is a metaphor for death; 2. the poet is yet another character who interacts with the dead person to know how death feels to be and what it is. Citations and how they fit the Argument: 1. (line 3) gives the theme of the poem; 2. (lines 5-7) say how powerful death is; the facts about death could burn a hole; 3. (lines 11, 12) brings out the fact that death strikes like an accident and is barely noticed till it arrives; 4. (lines 18-20) hint that death is unavoidable and inexplicable factor in each one’s life. Everyone born must die and the poet is made to realize it; 5. (lines 28-32) talk about how it feels to be dead. â€Å"Conversation† by Ai explores the experience of death. It is a conversation between the poet and a dead person. Like a Dramatic Monologue, the poem captures the voice of the dead man and the response of the poet. Death is described as horrible; it is like an accident. The color of death is presented as blue. The truth about death is so powerful that it could cause holes on the floor. The poet is made to realize the universal truth that someday all the lives will snap. It is unavoidable and is the

Case Analysis - Is there a Hybrid Automobile in your Future Essay

Case Analysis - Is there a Hybrid Automobile in your Future - Essay Example As automobiles cannot be done without in modern life, the natural choice would be to design and build vehicles which could run on some miraculous, alternative, non polluting fuel with minimal or zero emission. Such miraculous discovery, if possible, could kill two birds with one stone. Hybrid cars are a venture in this direction. As it is not possible to build an automobile which could run solely on electric, solar or any other source of power immediately, as it would put tremendous strain on research, development and financial resources, the availability of hybrid cars is a welcome transitory stage into the future. After the successful launch of the Prius model by Toyota, many other automobile giants have leapt into the fray of manufacturing hybrid cars for the future. To be successful in the market, a hybrid car has to appeal to the general public in terms of cost of ownership as well as performance. 2. Key Problems To be successful in the market, a hybrid car has to appeal to the general public in terms of cost of ownership as well as performance. 2. Key Problems To be successful in the market, a hybrid car has to appeal to the general public in terms of cost of ownership as well as performance. As evident from previous research, only people with education and annual income in the range of $ 100,000 have bought hybrid vehicles available in the market at present, as they come at a premium. People with lower incomes and low education level have to contend with cheaper gasoline models as it is beyond their pocketbooks to buy hybrid cars, as well as fully comprehend the advantages of owning one. The key problems are therefore increasing the awareness about the benefits of a hybrid model, and putting a cheap hybrid model within their financial access and range. Rising fuel prices will automatically force people to seek cheaper alternatives and it is a good marketing strategy for the future to design a car to fulfill this need. 3. Possible Solutions Solutions to t he problem are already in place as awareness about the greenhouse effect has been boosted by the efforts of governments and international bodies. It is also becoming more difficult day by day to own and maintain traditional gasoline guzzling giant cars. Smaller fuel efficient models are more marketable as well as affordable for the end users. However, government efforts to divert the public to use public transportation as an alternative have proved futile as people feel the need for independent control of their movement (Doll, 2008). Already the sales figures for hybrid models are increasing steadily in the US. In the year 2006, a total of 262,000 hybrid cars, primarily the Toyota Prius and other models from the company were sold nationwide (Doll, 2008). Companies like Honda, GM, Ford and Lexus soon came up with their own hybrid models in the market. Toyota, which overtook General Motors as the world’s largest automobile company however has experienced some hiccups since then . One problem it faced was the recall of some of its models due to faulty design and a patent lawsuit against its hybrid cars by a Florida based company, Paice LLC (Web, 2009). Such obstacles need to be sorted out between competing manufacturers in the greater interest of fuel efficiency and a healthy environment for the present and future generations. Innovations are already underway for developing fuel cells to power electric vehicles which cause the least pollution and are more energy

Macbeth Essay Example for Free

Macbeth Essay In Act 2 Scene 2, Lines 1 to 13 of Shakespeare’s â€Å"Macbeth†, Shakespeare questions the reader about who in truth is controlling Macbeth, Lady Macbeth or himself. Shakespeare also makes us ponder if Lady Macbeth has a healthy ambition, that she herself controls, or if her ambition is controlling her. The three main themes of Evil, Ambition, and Macbeth-The Victim of Manipulation are heightened through the use of Positive and Negative Sleep Motifs, expressed in a negative context. Also found in this selection are examples of Negative Diction, Religious Symbolism, and Animal Imagery which all develop the reader’s understanding of death, and develop the three key themes that circulate around the idea of death. Contrast is used to express the difference in power and confidence between Lady Macbeth and King Duncan’s attendants, and also to distinguish life and death, in the case of the attendants. Punctuation is used very effectively. Through the use of punctuation, one can visualize the emotions of Lady Macbeth. During the first few lines, each line is its own individual sentence, which ends in a period or colon. Simply by looking at the punctuation one can see that she is calm. Near the end of these lines, Lady Macbeth uses many commas, caesuras, and enjambments, she is out of order. Here one can sense just how nervous and frightened Lady Macbeth is. The final key device used in these lines is Foreshadowing. It gives the reader a glance at what will come out of Lady Macbeth and Macbeth’s decision to kill Duncan through the archetype of â€Å"fire†, which appears in line 2. Fire symbolizes light and warmth, yet at the same time symbolizes chaos and destruction. This can be related to their decision which will either make them or break them. Found throughout this passage are many literary devices, all of which are significant. However the most significant devices are Negative Diction, Religious Symbolism, and Sleep Motif. Religious Symbolism is immensely important in shaping Lady Macbeth’s character and sculpting the recurring themes, yet does not appear nearly as much as Negative Diction and Sleep Motif. One can find Lady Macbeth say â€Å"The doors are open†, Here she is literally talking about the doors to Duncan’s chamber, however one can interpret these doors as the doors of death. The doors are open for Duncan to walk through. This line can be related to Alexander Grahame Bell’s famous quote â€Å"As one door closes, another door opens. † Both Lady Macbeth’s and Mr. Bell’s quotes relate to death in a way; the door of life closes, and the door of death opens, waiting for us to walk through. Another example of Religious Symbolism is found in the lines â€Å"That death and nature do contend about them // Whether they live or die. This is symbolic of God and the Devil having a battle for the lives of the attendants, and later dueling for them to either be rewarded in Heaven or condemned to Hell. The image of God and the Devil gambling for the souls of the dead is expressed in the song â€Å"Spanish Train† by Chris De Burgh. This song has a similar religious meaning, as in both one can see a battle going on between God and the Devil for minor pawns or as one likes to say, humans. Another device, Sleep Motif, is used throughout these lines to portray the idea of sleep. In this piece one can find two main ideas: death and sleep. These two ideas are interconnected by a Religious meaning. One can see just how cleverly William Shakespeare uses the two devices of religious symbolism and sleep motif. Without one, the other, would not be as important. These two tools work hand in hand to develop the character of Lady Macbeth and the several themes throughout the play. Most of these sleep-orbiting words can be divided into three categories. The first category being what one usually consider sleep as, what we do each night in order to rest our body for the new day. This category can be referred to as the conscious form of sleep. Words that fall under this category are â€Å"good-night†, â€Å"snores†, â€Å"slept†, and â€Å"awaked†. These terms are the most positive sleep revolving words found in these lines. The next form of sleep is the sub-conscience form of sleep. This form of sleep is commonly known as â€Å"drunk† or â€Å"intoxicated†, and is usually found quite discouraging. â€Å"Drunk†, â€Å"Surfeited†, â€Å"Drugg’d†, and â€Å"Possets† fall under the sub-conscious form of sleep. The last category of sleep is the unconscious form. Words that fall under this category may seem depressing for non-believers of an afterlife or second life, but for believers they symbolize a new beginning. This form of sleep is tied in greatly with religious symbolism because it is rooted in the spiritual life. One does not quite know what happens after death, however there is a general belief that the spirit lives on, while the body lays under an eternal rest. The reader can see just how influential sleep is in this excerpt. One sees a sleeping Duncan, and later a deceased Duncan and also sees drunk attendants by Duncan’s side. In these few lines the reader envisions all three types of sleep. Although both Sleep Motifs and Religious Symbolisms play a huge role in shaping the themes of this scene, the most used device, and particularly important in these 13 lines is Negative Diction. Throughout, one sees words spoken wickedly by Lady Macbeth. She speaks wickedly about a wicked deed. Throughout the text one can see numerous examples of negative diction; â€Å"drunk†, â€Å"stern’st good-night†, â€Å"the owl that shriek’d the fatal bellman†, â€Å"surfeited†, â€Å"mock†, â€Å"drugg’d†, â€Å"death†, â€Å"die†, â€Å"confounds†, â€Å"afraid†, and â€Å"daggers†. Through Lady Macbeth’s vocabulary one can easily sense just how sinister Lady Macbeth is in both her words and actions. In this section of â€Å"Macbeth† one finds several literary tools that aid in conveying the character of Lady Macbeth and the three central themes. The most important devices used throughout this passage include Religious Symbolism, Sleep Motif, and Negative Diction. These three devices are interconnected as they revolve around the ideas of sleep and death. These three terms work together to shape the reader’s understanding of death and sleep which Shakespeare exemplifies to us through Lady Macbeth’s manipulation of Macbeth into the killing of the righteous King Duncan. The reader can relate what Shakespeare illustrates to the Human Condition. Everybody in life has ambitions, be it big or small, most people strive to help themselves, and through helping themselves, they help others around them. In few scenarios like in the case of Lady Macbeth, her foul ambitions overpower her and corrupt her to a point of sheer evil.

The Quality of the Information in Recruitment Documents :: Business Management Studies

The Quality of the Information in Recruitment Documents I discussed HSBC’s key recruitment documents and came to the conclusion that the recruitment and selection process at the company was of the up most importance. I now plan to look at these documents in greater detail. Ø Job Description The main purpose of a job description at any company is to allow candidates to get a brief view of what the job entails. It also allows candidates to assess whether they think they would be suited in that particular job. Below is an example of a job description at HSBC: Role Title: Transfers and Settlements Administration (Job Number – 1.2.2.5) Location: Client Service Centre Reporting to: Client Administration Manager From looking at the above job description we can see that HSBC include: - What the title of the job will be - Where the job will be located - Who the employee should report to To include the title of the job is obviously an important part of any job description. It allows candidates to know what role they are applying for and if successful, the role they will take on. The location of the job is also important, as candidates need to know where to apply. Also if the candidate is successful they need to know whom they are reporting to and for this reason this information is also included in the job description. The job role title allows candidates to get an insight into the type of duties they will be required to carry out. For the particular job role in the job description above, employees will be expected to carry out the following: - Undertake stock transfers on behalf of HSBC clients with SFA regulations and strict internal and external service legal agreements - Undertake trade settlements and correction on behalf of HSBC clients within SFA regulations and strict internal and external service legal agreement - This requires employees to have effective communication skills in order to correspond with internal and external clients There is a section in the description that outlines the key tasks/outputs that the job will involve. These give the candidate a more detailed view of what is expected from them and allows them to make a more informed decision as to whether they think that the job is for them. This also gives candidates a sight into the background of HSBC and is usually very well detailed and presented. Ø Person Specification The person specification outlines what type of person is needed to carry out the job and specifies any skills or qualifications that they require. Is also details what qualities and competencies are needed.