why is the electron gain enthalpy …
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Yogita Ingle 6 years, 3 months ago
The negative electron gain enthalpy is more in sulphur than in oxygen because, both of them are in 16th group in which teh oxygen is 1st element which has the minimum size and sulphur has larger size due to addition of a new shell.
So, due to smaller size the inter-electronic repulsion in compact 2p-orbitals of oxygen is much more than the repulsion in 3p-orbitals of sulphur hence, the incoming new electron feels less attraction in oxygen and more attraction in sulphur due to which the addition becomes easy and so electron gain enthalpy becomes more negative in sulphur.
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