# Ch13 answers - 13.39 Q =-2,190,000 kJ/kmol-fuel(assumes...

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Answers to Assigned Problems from Chapter Thirteen 13.2 Annual CO 2 output per automobile = 9,300 lb/y based on: modeling gasoline as octane (C 8 H 18 ); 12,000 miles per year; 25 miles/gal. 13.6 (a) Rxn: (0.4 CH3OH + 0.5 C2H5OH +0.1 N2) + 2.793 (O2+3.76 N2) 1.4 CO2 + 2.3 H2O + 0.693 O2 + 10.6 N2 (b) AFmass = 9.96 kg-air/kg-fuel; AFmolar = 13.29 kmol-air/kmol-fuel 13.12 (a) SO2 production = 0.116 lb-SO2/lb-coal; (b) AFmass = 9.78 kg-air/kg-coal
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Unformatted text preview: 13.39 Q = -2,190,000 kJ/kmol-fuel (assumes 0.704 kmol-H2O exists as vapor in products, rest of product water is liquid – be sure you know why) 13.46 T = 197 C 13.50 Enthalpy of combustion (H2O-vapor) = -2.657 x 10 6 kJ/kmol = -45,700 kJ/kg; Enthalpy of combustion (H2O-liquid) = -2.877 x 10 6 kJ/kmol = -49,500 kJ/kg 13.53 Enthalpy of combustion (H2O-vapor) = -54,152 Btu/lbmol fuel mwe 10/30/2007...
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## This note was uploaded on 05/22/2008 for the course ME 3124 taught by Professor Uvandsburger during the Spring '08 term at Virginia Tech.

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