The CORRECT order of Delta H_{eg} of the foll | vedclass

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(B) The $CORRECT$ order of electron gain enthalpy $(\Delta H_{eg})$ is $O < S < F < Cl$.Generally,electron gain enthalpy becomes more negative (more e

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$O < S < F < Cl$

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(B) The $CORRECT$ order of electron gain enthalpy $(\Delta H_{eg})$ is $O Generally,electron gain enthalpy becomes more negative (more exothermic) as we move from left to right across a period due to a decrease in atomic size and an increase in effective nuclear charge.However,for elements in the second period $(O, F)$,the incoming electron experiences significant inter-electronic repulsion due to the small size of the $2p$ orbitals. As a result,elements of the third period $(S, Cl)$ have more negative electron gain enthalpy values than their corresponding second-period counterparts.Therefore,the order is $O < S < F < Cl$ (where the values are increasingly negative).

The $CORRECT$ order of $\Delta H_{eg}$ of the following elements is

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