There is no 2nd electron affinity energy of chlorine - that would refer to the reaction Cl- (g) + e- -> Cl2- (g). Cl has only one electron affinity, which you have to multiply by 2 because you will need to multiply the reaction Cl (g) + e- -> Cl- (g) entirely by 2 to express it in terms of the other reactions given using Hess' law.
Original post by Big-Daddy
There is no 2nd electron affinity energy of chlorine - that would refer to the reaction Cl- (g) + e- -> Cl2- (g). Cl has only one electron affinity, which you have to multiply by 2 because you will need to multiply the reaction Cl (g) + e- -> Cl- (g) entirely by 2 to express it in terms of the other reactions given using Hess' law.
Ahh ok thank you.
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