1. Pentane (C5H12) burns with air so that a fraction x of the carbon is converted to CO2. The remaining carbon appears as CO. There is no free O2 in the products. Develop plots of the air-fuel ratio and the percent of theoretical air versus x, for x ranging from zero to unity.
2. For each of the following mixtures, determine the equivalence ratio and indicate if the mixture is lean or rich:
(a) 1 kmol of butane (C4H10) and 32 kmol of air.
(b) 1 lb of propane (C3H8) and 14.5 lb of air.