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F(2)C=CF-CF = CF(2) rarr F(2)underset(FC...

`F_(2)C=CF-CF = CF_(2) rarr F_(2)underset(FC=)underset(|)(C)-underset(CF)underset(|)(CF_(2))`
For this reaction (ring closure), `DeltaH =- 49 kJ mol^(-1), DeltaS =- 40.2 J K^(-1) mol^(-1).Up` to what temperature is the forward reaction spontaneous?

A

`1492^(@)C`

B

`1219^(@)C`

C

`946^(@)C`

D

`1089^(@)C`

Text Solution

Verified by Experts

For spontaneous process
`DeltaG = DeltaH - T DeltaS` (should be negative)
`:. T gt(DeltaH)/(DeltaS)`
`T gt (-49 xx 1000)/(-40.2)`
`T gt 1219K, i.e., 946^(@)C`
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