Suppose you want to heat the air in your house with natural gas (CH_4). Assume your house has 275 m^2 of floor are and ceilings are 2.5 m from floors. The air in your house has a specific heat capacity of 29.1 J/mol K. The number of moles in the house can be found by assuming the molar mass of air is 28.9 g/mol and that the density of the air at these temperatures is about 1.22 g/L. How much grams methane do you have to burn to heat air from 15.0 to 22.0 C? So, here is how I think I can solve it. 1. Determine number of moles of air. I have no idea how to do that. 2. specific heat*temp*moles of CH4 = specific heat*temp*moles of water. But I can't! Any help, please?