Gasoline is a mixture of hydrocarbons with between 4 and 12 carbon atoms. Octane

Question

Gasoline is a mixture of hydrocarbons with between 4 and 12 carbon atoms. Octane (C8H18; CH3CH2CH2CH2CH2CH2CH2CH3) is an eight- carbon hydrocarbon, which is one major component of gasoline 1. Use bond energies to calculate the enthalpy of combustion for octane or for ethanol. 2. Write and balance the reaction for the combustion of octane or ethanol 3. Look up all the bond enthalpies for the reactants and products. Calculate the sum of the bond energies in all of the reactants and in all of the products, paying attention to the number of bonds in the molecules and the stoichiometric coefficients for each molecule from the balanced chemical equation 4. Calculate the heat of combustion. Express the final answer as kJ/mol. W the calculated H? hat is the balanced equation and

Explanation / Answer

2. Balanced equation dor the combustion of Octane

2 C8H18 + 25 O2 = 16 CO2 + 18 H2O

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