Gasoline enters a combustion chamber at 1 atm, 298 K at a rate of 0.09 kg/min where

Question:

Gasoline enters a combustion chamber at 1 atm, 298 K at a rate of 0.09 kg/min where it burns steadily and completely with 70% excess air that enters the chamber at 1 atm, 200 K. If the exit temperature of the combustion products is 800 K, determine
(a) The mass flow rate of air and
(b) The rate of heat transfer. Use the IG mixture model for gases. Represent gasoline by liquid octane.