4/4 [40 pts.] 4. In a steady-flow combustion process, liquid octane (C3H18) enters a combustion chamber at temperature of 25C and pressure of 1 atm at a rate of 0.25 kg/min. It is burned with 50% excess air that also enters at 25C and 1 atm. After combustion, the products exit the combustion chamber and cools to 25C at 1 atm. Assuming complete combustion and that all the H20 in the products is in liquid form, determine a. The total heat transfer from the combustion chamber in kJ/kmol of C3H18. Assume that To = 298 K. b. The heat transfer rate in kJ/min. To = 298 K COH (0) 25C Products Combustion chamber I atm 25C Air 25C