Calculate Delta H for the reaction :Mg + H2 + O2 → Mg(OH)2?

Question

Given the following data:


2Mg + O2 → 2MgO Delta = −1204


MgO + H2O → Mg(OH)2 Delta H = −37


2H2O → 2H2 + O2 Delta H = +572 kJ

Answer 1

To half of the first, add the second and subtract half of the third.