Acetylene gas (C2H2) at 25°C is burned during a steady-flow combustion process with 30 percent excess air at 27°C. It is observed that 75,000 kJ of heat is being lost from the combustion chamber to the surroundings per kmol of acetylene. Assuming combustion is complete, determine the exit temperature of the product gases.

Final answer should be TP = 2062.1 K

Explanation:

Assumptions:

Combustion is complete.

Air and combustion gases are ideal gases.

Kinetic and  potential energies are negligible.

There are no work interactions.

Analysis:

The fuel is burned completely with the excess air, and thus the products will contain only CO2,  H2O, N2, and some free O2. Considering 1 kmol of C2H2, the combustion equation can be written as:

(the rest of the solution is attached)