The following are the thermochemical equations for the combination of oxygen with sulfur to form sulfur dioxide and for the combination of oxygen with sulfur to form sulfur trioxide: S(s) + O2(g) → SO2(g) AH = -296.8 kJ 2S(s) + 302(g) → 2SO3(g) AH = -791.4 kJ Using the above thermochemical equations, and applying Hess' Law, determine AH for the following reaction: 2SO2(g) + O2(g) → 2SO3(g) AH = ? %3D

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