The stream of air and gasoline vapor, in the ratio of 14:1 by mass, enters a gasoline engine at a temperature of 300C and leaves as combustion products at a temperature of 7900C. The engine has a specific fuel consumption of 0.3kg/kWh. The net heat transfer rate from the fuel-air stream to the jacket cooling water and to the surroundings is 35kW. The shaft power delivered by the engine is 26kW. Compute the increase in specific enthalpy of the fuel-air stream, assuming the changes in kinetic and potential energy to be negligible