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Explain why o-h has a bond energy of 463 kJ/mol compared to the S-H bond energy...

Explain why o-h has a bond energy of 463 kJ/mol compared to the S-H bond energy of 339 kJ/mol.

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Answer #1

O- H bond energy is 463 kJ / mol

S-H bond energy is 339 kJ / mol

this means that OH bond energy is more than that of S-H bond energy . it is due to high electronegativity of oxygen atom . because of high electronegativity of O atom compared to S atom , the O atom holds good the hydrogen compared to S. so O-H bond energy is more than S-H

another reason is that small atomic size of O and bigger atomic size of S. due to bigger atomic size S , S cannot overalap with hydrogen . so the S-H bond is very weaker

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