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
Correct Answer:
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