A natural gas(CO2=0.5% ,CH4=92.5%,C2H6=4.0%) is burnt with excess air . Determine a) the volume of air (b) volume of flue gas percubic meter of gas and also (c) the dew point (d) composition (e) average molecular weight of combustion products.

Ans-a) 12.09Nm cube /Nm3

b) 11.91Nm3/Nm3

c) 563 degree celius

d) CO2 = 10.2% ,O2 =3.0% , N2 =86.8%

e) 27.8