Natural gas whose molar composition is 95% CH4 and 5% CO2 is burned with 20% excess air, all entering 25 C in the combustion chamber. The products leave the combustion chamber at a temperature of 40 C.

a) Determine the density of natural gas at 101.3 kpa and 25 C.

b) Determine the amount of air required for combustion described above, in km of air/kmol of fuel.

(c) Determine the dew point of the products.

d) Determine the quantity of condensed water and the molar composition of the products after condensation.

e) Calculate the heat transfer of the combustion chamber, in KK/kmol of fuel.