Acetylene gas (C2H2) is burned completely with 20 percent excess air during a steady state-flow combustion process and the chemical reaction is presented below. The fuel and air enter the combustion chamber at 25 C, and the products leave at 1500 K. Molar mass of the air is 29 kg/kmol a/ Calculate x, y, z and ah in order to get an equilibrium C2H2 + 1.2 an(O2 +3.76. N2)-x.CO2 + y. H2O +0.2an.O2+2N2 b/ Determine the air-fuel ratio c/ Calculate Q 0 98 K 500 K Substance kJ/kmol kJ/kinol 226,730 kJ/kmol C.H 25°C Air 20% excess air 25°C CH O2 | Combustion Products 8682 8669 9904 9364 49,292 47,073 57,999 71,078 241,820 393,520 P= 1 atm CO,