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Solution: Calculate the enthalpy of formation of SO2 (g) from the standard enthalpy changes of the following reactions: 2SO2 (g) + O2 (g) → 2SO3(g)             ΔH°rxn = -196 kJ 2S (s) + 3O2 (g) → 2SO3 (g)              ΔH°rxn = -790 kJ S (s) + O2 (g) → SO2 (g)                    ΔH°rxn = ?

Problem

Calculate the enthalpy of formation of SO2 (g) from the standard enthalpy changes of the following reactions: 

2SO2 (g) + O2 (g) → 2SO3(g)             ΔH°rxn = -196 kJ 

2S (s) + 3O2 (g) → 2SO3 (g)              ΔH°rxn = -790 kJ 


S (s) + O2 (g) → SO2 (g)                    ΔH°rxn = ?


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