Acetylene gas (C2H2) is burned completely with 20

Acetylene gas (C2H2) is burned completely with 20 percent excess air during a steady-flow combustion process. The fuel and the air enter the combustion chamber separately at 25°C and 1 atm, and heat is being lost from the combustion chamber to the surroundings at 25°C at a rate of 300,000 kJ/kmol C2H2. The combustion products leave the combustion chamber at 1 atm pressure. Determine, (a) The temperature of the products,, (b) The total entropy change per kmol of C2H2, and, (c) The energy destruction during this process.