Problem 4: (Chemical Reaction). An Octane gas (C,H) is burned with air in a constant pressure (p=1 atm) burner. Write the combustion equation for 80 percent excess air. The gas

and air enter the combustion chamber at 25 C and the products leave the chamber at 220 C. If Octane enters the chamber at 2 kg/min, what is the mass flow rate of air? Also,calculate the heat transfer in kJ/kg fuel during combustion.