Using the equations N, (g) + O, (g) 2 NO (g) AH° = 180.6 kJ/mol
N, (g) + 3 H, (g) → 2 NH (9) AH° = -91.8 kJ/mol
2 H, (g) + 0, (g) → 2 H O (9) AH° = -483.7 kJ/mol
Determine the enthalpy (in kJ/mol) for the reaction
4 NH, (g) + 5 0, (g) → 4 NO (g) + 6 H,0 (g).

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