Would you expect the second electron gain enthalpy of O as positive, more negative or less negative than the first? Justify your answer

Asked by Pragya Singh | 1 year ago |  74

##### Solution :-

$$O^−$$ ion is formed when O-atom gains one electron and the energy is being released during this process. So the 1st electron affinity for O-atom is negative.

$$O_{(g)} + e^{-} \rightarrow O_{g}^{-}$$

If an electron is added in $$O^{-}$$ ion then it forms $$O^{2-}$$ ion, the energy is required to be given to counter the strong electronic repulsions. So, the 2nd electron affinity of O-atom is positive.

$$O^{-}_{(g)} + e^{-} \rightarrow O_{g}^{2-}$$

Answered by Abhisek | 1 year ago

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