When the first electron gain enthalpy - egH of oxygen is -141 kJ-mol- its second electron gain enthalpy is-

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When the firs...

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When the first electron gain enthalpy $(Δ_{e g} H)$ of oxygen is $- 141 k J / m o l,$ its second electron gain enthalpy is:

Negative, but less negative than the first

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A positive value

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A more negative value than the first

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Almost the same as that of the first

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Solution

The correct option is B A positive value
Second electron gain enthalpy is always positive for any element, as energy has to be supplied to overcome the repulsion betwen the anion and the incoming electron.

$O^{-} (g) + e^{-} \to O^{2 -} (g); Δ_{e g} H = positive$
C is the correct option

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When the first electron gain enthalpy (ΔegH) of oxygen is −141 kJ/mol, its second electron gain enthalpy is:

The correct option is B A positive valueSecond electron gain enthalpy is always positive for any element, as energy has to be supplied to overcome the repulsion betwen the anion and the incoming electron. O−(g)+e−→O2−(g) ; ΔegH=positive C is the correct option

When the first electron gain enthalpy $(Δ_{e g} H)$ of oxygen is $- 141 k J / m o l,$ its second electron gain enthalpy is:

The correct option is B A positive value
Second electron gain enthalpy is always positive for any element, as energy has to be supplied to overcome the repulsion betwen the anion and the incoming electron.

$O^{-} (g) + e^{-} \to O^{2 -} (g); Δ_{e g} H = positive$
C is the correct option