Propane (C3H8) burns according to the following balanced equation:
Calculate ΔH∘rxn for this reaction using standard enthalpies of formation. (The standard enthalpy of formation of gaseous propane is -103.9 kJ/mol.)

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  1. Now you need dHof fpr H2O gas.

    dHrxn = (n*dH products) - (n*dH reactants)

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  3. -103.9

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