Ionization energy of the element X( g ) is I and the electron affinity of X+( g ) is E then

Question

Ionization energy of the element X( g ) is I and the electron affinity of X+( g ) is E then (A) I=E (B) I=-E (C) I=(E/2) (D) I=-(E/2)

Tardigrade Admin · Accepted Answer

X( g ) arrow X+( g )+e-, Δ H=I X+( g )+e- arrow X( g ), Δ H=-I Thus, I=-E

Q. Ionization energy of the element $X (g)$ is $I$ and the electron affinity of $X^{+} (g)$ is $E$ then