Example 6: Coal Gas at 15C, 760 torrs and saturated with water vapor is burned in a furnace. Air with 60% RH is supplied at the rate of 5.7 m/ m3 coal gas and enters at the same temperature and pressure as the coal gas. The coal gas analyzes 1.4% CO2, 2.7% C2H2, 0.7%02, 5.8% CO, 53.2% H2, 29.6% CH4, and 6.6% N2. The molar ratio of CO2 to CO in the stack gas is 10:1. All the H2 in the fuel is burned to water. The stack gas leaves at 4000C and 100 kPa. Calculate: a) % excess air b) Orsat Analysis of the stack gas c) m3 stack gas/m3 of coal gas d) Dew Point of the stack gas