Ammonia (NH3 (g), Delta. Hf = - 45.9 kJ/mol) reacts with oxygen to produce nitrogen and water (H2 O (g), Delta. Hf = - 241.8 kJ/mol) according to the equation below. 4 upper N upper H subscript 3 (g) plus 3 upper O subscript 2 (g) right arrow 2 upper N subscript 2 (g) plus 6 upper H subscript 2 upper O (g). What is the enthalpy of the reaction?
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