What volume of air at 1.0 atm and 25 degree Celsius must be taken to an engine to burn 1 gallon of gasoline?
Assuming that:
2 C8H18 + 25 O2 --> 16 CO2 + 18 H2O
provides reasonable model of the actual combustion process. ( The partial pressure of oxygen in air is 0.21 atm and the density of liquid octane is 0.70g/mL)