Ammonia (NH3 (g), Hf = - 45.9 kJ/mol) reacts with oxygen to produce nitrogen and water (H2 O (g), Hf = - 241.8 kJ/mol) according to the equation below. What is the enthalpy of the reaction? 1) - 3,572.1 kJ 2) - 1,267.2 kJ 3) 1,267.2 kJ 4) 3,572.1 kJ
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