Solve the following problems:
Problem I: Calculate the low calorific power of methane CH4 with air at 298 K, assuming that the products of reaction are CO2 and H2O(gas).
Problem II: Determine the heat of reaction of ethane C2H6 in cal/mol and kcal/m3.
Problem III: Determine the low calorific power of natural gas analyzing 83% CH4, 16% C2H6, and 1% N2.
Show how you get the answer, so that I can better understand how to do it.