Problem: Calculate ΔH°rxn for the reaction 2Ni (s) + 2S (s) + 3O2 (g) → 2NiSO3 (s) from the following information: (1) NiSO3 (s) → NiO (s) + SO3 (g)     ΔH°rxn = 156 kJ (2) S (s) + O2 (g) → SO2 (g)     ΔH°rxn = - 297 kJ (3) Ni (s) + 1/2O2 (g) → NiO (s)     ΔH°rxn = -241 kJ

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Calculate ΔH°rxn for the reaction 

2Ni (s) + 2S (s) + 3O2 (g) → 2NiSO3 (s) 

from the following information: 

(1) NiSO3 (s) → NiO (s) + SO3 (g)     ΔH°rxn = 156 kJ 

(2) S (s) + O2 (g) → SO2 (g)     ΔH°rxn = - 297 kJ 

(3) Ni (s) + 1/2O2 (g) → NiO (s)     ΔH°rxn = -241 kJ

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Based on our data, we think this problem is relevant for Professor Pelton's class at UMN.