A gasoline engine operates steadily on a mixture of isooctane and air. The air and fuel enter the engine at 25OC. The fuel consumption is 3.0 as. The output of the engine is 50 kW. The temperature of...

A gasoline engine operates steadily on a mixture of isooctane and air. The air and fuel enter the engine at 25OC. The fuel consumption is 3.0 as. The output of the engine is 50 kW. The temperature of the combustion products in the exhaust manifold is 660 K. At this temperature, an analysis of the combustion products yields the following values (on a dry volumetric basis):

CO₂, 11.4%; 02, 1.6%; CO₂
2.9%; N2, 84.1%

(a) Find the composition in moles (number of moles per mole of isooctane) of the reactants and the reaction products.

(b) Determine the heat-transfer rate from the working fluid as the working fluid passes through the engine. Constants for the calculations: