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.
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.)
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