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

Explanation

To determine whether the second electron gain enthalpy of oxygen is positive, more negative, or less negative than the first, we can analyze the process of electron gain in oxygen.

### Step-by-Step Solution:

1. **Understanding Electron Gain Enthalpy**:
- The electron gain enthalpy (ΔH) is the energy change when an electron is added to an atom in the gas phase. A negative value indicates that energy is released when the electron is added, while a positive value indicates that energy is required to add the electron.

2. **First Electron Gain Enthalpy of Oxygen**:
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