Calculate The $\Delta$ H $\degree$ _rxn for the Following Reaction $\Delta$ H $\degree$ _f [AsH₃(g)] = 66

Multiple Choice

Calculate the $\Delta$ H $\degree$ _rxn for the following reaction. ( $\Delta$ H $\degree$ _f [AsH₃(g) ] = 66.4 kJ/mol; $\Delta$ H $\degree$ _f [H₃AsO₄(aq) ] = -904.6 kJ/mol; $\Delta$ H $\degree$ _f [H₂O(l) ] = -285.8 kJ/mol)

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