[inferno9891]

The heat given off of the combustion of an unknown mass of methane heats 2700 liters of air by 10 degrees Celcius. All energy given off goes to heating the air.  Specific heat capacity of air = 30J/K * mol; 1 mol of air occupies 22.4 liters for all temperatures.  Determine the mass of methane.

I've tried using q = m * Cs * change in T, but I keep getting a wrong output.

[Borek]

Don't you need specific heat of combustion as well?

[inferno9891]

I would suppose so.