B (Putting the Concepts to Work): Completion (30 marks): Using your reading, answer the your answer as well as your strategy for determining your answer. As part of your answer, giv ebsite) that you used to find the answer the question. 1. (five marks) Use the following information to answer the next question. Methane (CH4) is natural gas that occurs in marshy places The heat of combustion for C(s),H2(g) and CH4(g) are 393.5kJ, 285.8kJ, and 890.3kJ respectively. Calculate H for the reaction C(s)+2H2(g)CH4(g)