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)," "

Question

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)," "

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)`

Monjur Alahi

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2025-01-04 04:42

1 Answers

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Salim Ahmed Kawsar · Accepted Answer · 2023-02-05T15:29:48+06:00

`4C(s)+5H_(2)O+StoH-underset(H)underset(|)overset(H)overset(|)(C)-underset(H)underset(|)overset(H)overset(|)(C)-S-underset(H)underset(|)overset(H)overset(|)(C)-underset(H)underset(|)overset(H)overset(|)(C)-H`
`4C(s)+5H_(2)+2StoH-underset(H)underset(|)overset(H)overset(|)(C)-underset(H)underset(|)overset(H)overset(|)(C)-S-S-underset(H)underset(|)overset(H)overset(|)(C)-underset(H)underset(|)overset(H)overset(|)(C)-H`
`DeltaH=sum(BE)_(R)-sum(BE)_(P)`
(i). `-147.2="Heat of atomization of 4C, 10H, 1S"`
`-BE" of "10(C-H),2(C-s),2(C-C)`
(ii) `-201.9="Heat of atomization of 4C",10H,2S`
`-BE` of `10(C-H),2(C-S),2(C-C),(S-S)`
Subtracting (i) from (ii),
`-201.9+147.2="Heat of atomization of "1S-BE" of "(S-S)`
`=222.8kJ-BE` of `(S-S)`
BE of `(S-S)=277.5kJ`