Question
Calculate ? H rxn for the combustion of octane (C 8 H 18 ), a component of gasoline, by using average bond energies. Calculate ?
Calculate ? H rxn for the combustion of octane (C 8 H 18 ), a component of gasoline, by using average bond energies.
Calculate ? H rxn for the combustion of octane by using enthalpies of formation from Appendix IIB in the textbook. The standard enthalpy of formation of C 8 H 18 is -250 kJ/mol.
What is the percent difference between the two results?
Which result would you expect to be more accurate?
The value calculated from the heats of formation
The value calculated from the average bond energies
(8)0H6+(3)008 (8) 0+ (1) H)
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Thermodynamics for Engineers
Authors: Kenneth A. Kroos, Merle C. Potter
1st edition
1133112862, 978-113311286
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