Solved: Gaseous E10 fuel is 10 percent ethanol (C2H6O) and

Chapter 15, Problem 1564

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Gaseous E10 fuel is 10 percent ethanol (C2H6O) and 90 percent octane (C8H18) on a kmol basis. This fuel is burned with 110 percent theoretical air. During the combustion process, 90 percent of the carbon in the fuel is converted to CO2 and 10 percent is converted to CO. Determine (a) the balanced combustion equation, (b) the dew-point temperature of the products, in 8C, for a product pressure of 100 kPa, (c) the heat transfer for the process, in kJ, after 2.5 kg of fuel are burned and the reactants and products are at 258C with the water in the products remaining a gas, and (d) the relative humidity of atmospheric air for the case where the atmospheric air is at 258C and 100 kPa and the products are found to contain 9.57 kmol of water vapor per kmol of fuel burned.