•• Gasoline is a variable mixture of various hydrocarbons, such as octane (C8H18). To be d...

•• Gasoline is a variable mixture of various hydrocarbons, such as octane (C8H18). To be definite, consider pure octane and calculate the energy released by burning 1 kg of octane in the reaction

 2C8H18 + 25O2 → 16CO2 + 18H2O

using the following dissociation energies:

Note that these dissociation energies are the energies needed to separate each molecule completely into its individual constituent atoms. (Your answer here should be appreciably less than the value found in Example 12.2, which treated the oxidation of carbon atoms that were already separated.)