Recall that ΔH˚rxn can be calculated from the enthalpy of formation (ΔH˚f) of the reactants and products involved:
The chemical equation for that reaction is:
C2H4(g) + 3 O2(g) → 2 CO2(g) + 2 H2O(l)
The standard enthalpy of combustion of ethene gas, C2H4(g), is -1411.1 kJ/mol at 298 K. Given the following enthalpies of formation, calculate ΔHf° for C2H4(g).
CO2 (g) -393.5 kJ/mol
H2O (l) -285.8 kJ/mol
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