Propane (C3H8) burns according to the following balanced equation:
C3H8(g)+5O2(g)→3CO2(g)+4H2O(g)
You may want to reference (bookLink. gif pages 277 - 280) Section 6.9 while completing this problem.

Part A

Calculate ΔH∘rxn for this reaction using standard enthalpies of formation. (The standard enthalpy of formation of gaseous propane is -103.9 kJ/mol.)

Express the enthalpy in kilojoules to four significant figures.