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When the first electron gain enthalpy (t...

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

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This is on account of the smaller atomic size of oxygen as compared to that of sulphur and greater and greater electron crowding.
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DINESH PUBLICATION-THE P-BLOCK ELEMENTS -Questions From Board Examinations
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