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C(2)H(4) +CI(2) rarr C(2)H(4)CI(2) Del...

`C_(2)H_(4) +CI_(2) rarr C_(2)H_(4)CI_(2)`
`DeltaH =- 270.6 kJ mol^(-1)K^(-1), DeltaS =- 139 J`
a. Is the reaction favoured by entropy, enthalpy both or none?
b. Find `DeltaG` if `T = 300K`.

Text Solution

Verified by Experts

(i) As `Delta H` is `-` ve , reaction isfavoured by enthalpy.
As ` Delta S` is -ve, it is not favoured by entropy.
(ii) `Delta G =Delta H - T DeltaS`
`= - 270.6 k J mol^(-1) - 300 K ( -139 xx 10^(-3) kJ K^(-1) mol^(-1))`
`= -270.6 + 41.7 kJ mol^(-1)`
`= - 228.9kJ mol^(-1)`
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