(ΔHf of Reactant 1 x Coefficient) + (ΔHf of
Reactant 2 x Coefficient)
(ΔHf of Product 1 x Coefficient) + (ΔHf
of Product 2 x Coefficient)
[(-103.85 * 1) + (0 * 5)] = -103.85
+ 0 = -103.85 KJ/mol
[(-393.51 * 4) +(-241.82 * 3)] =
(-1574.04) + (-483.64) = -2057.68
KJ/mol