1. Butane (C4H10) burns completely with 150% of theoretical air. If the combustion products are cooled at 1 atm to temperature T, plot the amount of water vapor condensed, in kmol per kmol of fuel, versus T ranging from 20 to 608C.
2. Ethylene (C2H4) burns completely with air and the combustion products are cooled to temperatureT at 1 atm. The air-fuel ratio on a mass basis is AF.
(a) Determine for AF 5 15 and T 5 708F, the percent excess air and the amount of water vapor condensed, in lb per lbmol of fuel.
(b) Plot the amount of water vapor condensed, in lb per lbmol of fuel, versus T ranging from 70 to 1008F, for AF 5 15, 20, 25, 30.