Octane gas (C8H18) at 25oC, 1 atm enters a combustion chamber operating at steady state and burns with 120% of theoretical air entering at 25oC, 1 atm. The combustion products exit at 927oC and include only CO2, H2O, O2. If the mass flow rate of the fuel is 0.102 kg/s, determine the rate of heat transfer from the combustion chamber to the surroundings,