Question

Given the following data:

4NO(g) + 6H2O(g) → 4NH3(g) + 5O2(g) ΔH = 906.2 kJ
2NH3(g) → N2(g) + 3H2(g) ΔH = 91.8 kJ
N2(g) + O2(g) → 2NO(g) ΔH = +180.5 kJ


Find the ΔH of the following reaction:

2H2(g) + O2(g) → 2H2O(g)

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