# Problem: Methanol (CH3 OH) has been suggested as a fuel to replace gasoline. Write a balanced equation for the combustion of octane, C8H18, find ΔH˚rxn, and determine the mass of carbon dioxide emitted per kJ of heat produced. (ΔH˚rxn = –5074.1 kJ/mol for octane.)

###### FREE Expert Solution

We are asked to write a balanced equation for the combustion of octane, find ΔH˚rxn, and determine the mass of carbon dioxide emitted per kJ of heat produced.

The balanced combustion reaction is:

2 C8H18(l) + 25 O2(g) → 16 CO2(g) + 18 H2O(l)

Note that we need to multiply each ΔH˚f by the stoichiometric coefficient since ΔH˚f is in kJ/mol.

Also, note that ΔH˚f for elements in their standard state is 0.

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###### Problem Details

Methanol (CH3 OH) has been suggested as a fuel to replace gasoline.

Write a balanced equation for the combustion of octane, C8H18, find ΔH˚rxn, and determine the mass of carbon dioxide emitted per kJ of heat produced. (ΔH˚rxn = –5074.1 kJ/mol for octane.)