From the overall result of my test 2, I found that I don’t have big problem in solving the question for the energy balance on reactive process chapter. Basically, in this chapter we have to solve the heat of reaction by using several methods. For question 1, I did not get full marks because I get confuse whether I have to put negative sign for the heat of vaporization of water. Because of that mistake, I did not get the right answer for my heat of reaction and also the heat that being release in that process. These teach me to follow the hypothetical path that had been drawn carefully. Otherwise I will loss the marks easily for my final exam. For determining the enthalpy change by using Hess law is not really a problem. I have to know what the coefficient needed for each of the reaction given to obtain the final reaction that represent in the question.
While for the third question, the main thing that has be solve first is the mass balance for the involved. The number of mole that involved for each component can be obtained easily by referring to its balance chemical equation. The heat of reaction can calculate by using heat of formation method. Lastly, due to the carelessness in solving the mass balance, three marks had been deducted for my last question. Luckily, it is not affect my other calculation in finding the enthalpy change at each of the component involved. I was very satisfied with my result of my test 2 because the result of test 1 is quite bad. Hopefully my third test will not disappoint me.. 