Calculate the H°_rxn for the Following Reaction

question 13

Multiple Choice

Calculate the H°_rxn for the following reaction. (H°_f [AsH₃(g) ] = 66.4 kJ/mol; H°_f [H₃AsO₄(aq) ] = -904.6 kJ/mol; H°_f [H₂O(l) ] = -285.8 kJ/mol)
H₃AsO₄(aq) + 4H₂(g)  AsH₃(g) + 4H₂O(l)

• A) -1981.4 kJ
• B) -685.2 kJ
• C) -172.2 kJ
• D) 172.2 kJ
• E) 685.2 kJ

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