Given the Following Information, Calculate ΔH°(in Kcal Mol-1) For: I(g)

Given the following information, calculate ΔH°(in kcal mol-1) for: I(g) + e- → I-(g)

A) -633 kcal mol^-1
B) -450 kcal mol^-1
C) -71 kcal mol^-1
D) -696 kcal mol^-1
E) +712 kcal mol^-1