Consider the exothermic reaction
2C2H6 (g) + 7O2 (g) →4CO2 (g) + 6H2O (g)
Calculate the standard heat of reaction, or ΔH∘rxn, for this reaction using the given data. Also consider that the standard enthalpy of the formation of elements in their pure form is considered to be zero.
Reactant or product
ΔH∘f (kJ/mol) C2H6 (g) - 84.7 CO2 (g) - 393.5 H2O (g) - 241.8
Express your answer to four significant figures and include the appropriate units.
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