NCERT Class XI Chemistry Classification of Elements and Periodicity in Properties Solutions

Question : 21

Total: 40

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

Solution:

The second electron gain enthalpy of O is +ve. This is because energy has to be supplied to convert O(g)− to O(g)2− in order to overcome the repulsive forces.

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