Calculate the ΔH°_rxn for the Following Reaction

question 48

Multiple Choice

Calculate the ΔH°_rxn for the following reaction. (ΔH°_f [AsH₃(g) ] = 66.4 kJ/mol; ΔH°_f [H₃AsO₄(aq) ] = −904.6 kJ/mol; ΔH°_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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