Natural gas is a non-renewable hydrocarbon used as a source of energy for electricity
generation by burning it in a furnace with excess air. One hundred kmol/h of a gas containing
94.40 mole% methane, 3.40 mole% ethane, 0.60 mole% propane, and 1.60 mole% butane is
to be burned with 30% excess air.
a) Calculate the required molar flow rate of the air.
b) Calculate the extent of reaction for methane, ethane, propane, and butane.