An Important Step in the Synthesis of Nitric Acid Is $\Delta$

question 43

Multiple Choice

An important step in the synthesis of nitric acid is the conversion of ammonia to nitric oxide. $\Delta$ H°_f [NH₃(g) ] = -45.9 kJ/mol; $\Delta$ H°_f [NO(g) ] = 90.3 kJ/mol; $\Delta$ H°_f [H₂O(g) ] = -241.8 kJ/mol
4NH₃(g) + 5O₂(g) $\to$ 4NO(g) + 6H₂O(g)
Calculate $\Delta$ H°_rxn for this reaction.

• A)-906.0 kJ
• B)-197.4 kJ
• C)-105.6 kJ
• D)197.4 kJ
• E)906.0 kJ

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