The standard enthalpy change for the combustion of 1 mole of propane is –2043.0 kJ.         C3H8(g) + 5 O2(g) → 3 CO2(g) + 4 H2O(g) Calculate ΔfH° for propane based on the following standard molar enthalpies of formation.     molecule ΔfH° (kJ/mol-rxn)   CO2(g) –393.5   H2O(g) –241.8

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