The second electron gain enthalpy is ________

The equation used to represent the electron gain enthalpy is _________.

Why is the second electron gain enthalpy negative (i.e. energy is absorbed)?

The second electron gain enthalpies (in kJ mol^(-1) ) of oxygen and sulphur respectively are:

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

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

When the first electron gain enthalpy (triangle_(eg)H) of oxygen is -141 kJ//mol, its second electron gain enthalpy is :

The electron gain enthalpy of oxygen is "______" that of sulphur.