The electron gain enthalpy with negative sign for oxygen `(-141 Kj mol^(-1))` is less than of sulphur `(-200 kJ mol^(-1)` Or The value of electron gai
The electron gain enthalpy with negative sign for oxygen `(-141 Kj mol^(-1))` is less than of sulphur `(-200 kJ mol^(-1)`
Or The value of electron gain enthaply with negative sign for sulphur is higher than that of oxygen.
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The size of O atom is smaller than that of S.Thus, when an electron is added to neutral gaseous atom, the electron-electorn repulsions experienced in the smaller 2p-subshell of O are comparatively larger than those encountered in the bigger 3p-subsheel of S. As a reuslut, more energy is released
`O(g) +e^(-) to O^(-)(g), " " Delta_(eg)=-141kJmol^(-1)`
`O(g) +e^(-) to S^(-)(g), " " Delta_(eg)=-200kJmol^(-1)` in case die to ther inert pair effect. Thus, Bi(V) is a stronger oxidant than Sb (V).
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