Chapter 5, Problem 5.91PAE

93 The complete combustion of octane can be used as a model for the burning of gasoline:

   ${\text{2C}}_{\text{8}}{\text{H}}_{\text{18}}+{\text{25O}}_{\text{2}}\to {\text{16CO}}_{\text{2}}+{\text{18H}}_{\text{2}}\text{O}$

Assuming that this equation provides a reasonable model of the actual combustion process, what volume of air at 1.0 atm and 25°C must be taken into an engine to burn 1 gallon of gasoline? (The partial pressure of oxygen in air is 0.21 atm and the density of liquid octane is 0.70 g/mL.)