Question

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

Answer 1

For, the second electron gain enthalpy of Oxygen, energy has to be absorbed or in other words it's an endothermic process and thus less negative than the first one since it gatyers more energy.

Answer 2

it would me more than first electron gain enthaply due to electron - electron replusion . it would be postive