Question

Why second gain enthalpy of oxygen is positive?

Answer 1

Answer:

Now when another electron is added to O− it will form an O2− ions and energy is absorbed to overcome the strong electrostatic repulsion between the negatively charged O− ion and the second being added. Thus the second electron gain enthalpy of oxygen is positive (as the energy is absorbed).

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Answer 2

Answer:

Now when another electron is added to O− it will form an O2− ions and energy is absorbed to overcome the strong electrostatic repulsion between the negatively charged O− ion and the second being added. Thus the second electron gain enthalpy of oxygen is positive (as the energy is absorbed).

Explanation:

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