QUESTION 1 (PO1, PO2, CO1, CO2, C2, C4) a. Consider the following chemical reaction between component A and B: A (9) + 2B (g) C(g) + 3D (1) AH, =-2253.2 kj HER i. State whether the reaction is exothermic or endothermic. (1 mark) ii. Based on the value of heat of reaction, explain the chemical reaction above in terms of the energy associated with breaking or formation of molecular bonds. (2 marks) iii. Consider a similar reaction of A and B as the one shown above. However, the reaction now generates D in vapor form instead of liquid. Explain how the heat of reaction value differs from the one shown above. (2 marks) iv. If the above reaction occurs in an isothermal system where there is no work interaction and both kinetic and potential energy changes are too small such that they are negligible, write the energy balance for the system. (2 marks) b. Acetylene (C2H2) may be formed from methane (CH) by pyrolyzing-decomposing at high temperature according to the reaction: 2CH. (9) - C2Hz (g) + 3H2 (9) In a commercial reactor system, the methane is supplied as a liquid at 25C to a heater where it is heated and vapourised leaving as a vapour at 650C. The vapour then passes to the catalytic reactor in which a conversion of 40% is achieved it may be assumed that there are no other reactions, that operation is at a pressure of one atmosphere and that the stream leaving the reactor is all in the vapour state. With a complete block diagram of the process, determine the heat transfer rate (kW) required to the reactor if it is operated isothermally. Evaluate on the value of the heat transfer rate obtained from your calculation