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Question

Given the following reactions: 2NO(g) N2(g) + O2(g) ΔHo = -180 kJ 2NO(g) + O2(g) 2NO2(g) ΔHo = -112 kJ ∆Ho of the reaction below reaction is; N2(g) + 2O2(g) 2NO2(g) A) 68 kJ B) -68 kJ C)-292kJ D)292kJ