Dry methane is burned with dry air. Both are at 25 C initially. The flame temperature is 1300 C. If complete combustion is assumed how much excess air is being used? The reaction is, CH4 + 202 CO2 + 2HO.

Standard heat of reaction - 8.028 x 105 J/g mole of CH4 reacted. Mean molal specific heat of gases between 25 C and 1300 are in J/(g mole) (

K).

CO-51.88

HO 40.45

O-34.01

N = 32.21