Find bond enthalpy of S-S bond from the following data: `C_(2)H_(5)-S-C_(2)H_(5)," "DeltaH_(f)^(@)=-147.2kJ" "mol^(-1)` `C_(2)H_(5)-S-S-C_(2)H_(5)," "DeltaH_(f)^(@)=-201.9kJ" "mol^(-1)` `S(g)," "DeltaH_(f)^(@)=222.8kJ" "mol^(-1)`A. `-168.1 KJ//"mol"`B. `+168.1 KJ//"mol"`C. `-277.5 KJ//"mol"`D. `+277.5 KJ//"mol"`

Find bond enthalpy of S-S bond from the following data: `C_(2)H_(5)-S-

1.	Find bond enthalpy of S-S bond from the following data: `C_(2)H_(5)-S-C_(2)H_(5)," "DeltaH_(f)^(@)=-147.2kJ" "mol^(-1)` `C_(2)H_(5)-S-S-C_(2)H_(5)," "DeltaH_(f)^(@)=-201.9kJ" "mol^(-1)` `S(g)," "DeltaH_(f)^(@)=222.8kJ" "mol^(-1)`A. `-168.1 KJ//"mol"`B. `+168.1 KJ//"mol"`C. `-277.5 KJ//"mol"`D. `+277.5 KJ//"mol"`
Answer» Correct Answer - D `C_(2)H_(5)-S-C_(2)H_(2)+Srarr C_(2)H_(5)-S-S-C_(2)H_(5)` `DeltaH_(f)^(@)(C_(2)H_(5)-S-C_(2)H_(5))=DeltaH_(f)^(@)(C_(2)H_(5)_S-S-C_(2)H_(5))-DeltaH_(S-S)-DeltaH_("sub")S.` `DeltaH_(S-S)=277.5 KJ//"mol"`

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