Octane (C8H18 in gaseous form) is burned with dry air. The volumetric analysis of the products on

Question:

Octane (C8H18 in gaseous form) is burned with dry air. The volumetric analysis of the products on a dry basis is 8.86% CO2, 0.662% CO, 7.51% O2 and 82.978% N2. Determine
(a) The air-fuel ratio.
(b) The percentage of stoichiometric air used. If the initial pressure and temperature of the fuel air mixture are 100 kPa, 25oC, determine.