The bond dissociation energy of the E-H bond | vedclass

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(A) As we move down the group $16$ from $O$ to $Te$,the atomic size of the central element $E$ increases.Due to the increase in atomic size,the bond l

Vedclass · Accepted Answer

$H_2O > H_2S > H_2Se > H_2Te$

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(A) As we move down the group $16$ from $O$ to $Te$,the atomic size of the central element $E$ increases.Due to the increase in atomic size,the bond length of the $E-H$ bond increases.As the bond length increases,the bond strength decreases,which leads to a decrease in the bond dissociation energy.Therefore,the order of bond dissociation energy is $H_2O > H_2S > H_2Se > H_2Te$.

The bond dissociation energy of the $E-H$ bond in the $H_2E$ hydrides of group $16$ elements (where $E = O, S, Se, Te$) follows which order?

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