If the standard enthalpy of combustion of octane c8h18l at, Ask an Expert

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If the standard enthalpy of combustion of octane, C8H18(l), at 298 K is -5471 kJ x mol-1, calculate the standard enthalpy of formation of octane. The standard enthalpies of formation of carbon dioxide and liquid water are -393.51 and -285.83 kJ x mol-1 respectively.

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