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The enthalpy and entropy change for the ...

The enthalpy and entropy change for the reaction,
`Br_(2)(l)+Cl_(2)(g)rarr2BrCl(g)`
are `30KJmol^(-1)` and `105JK^(-1)mol^(-1)` respectively. The temperature at which the raction will be in equilibrium is:

A

`450 K`

B

`300 K`

C

`285.7 K`

D

`273 K`

Text Solution

Verified by Experts

The correct Answer is:
C
At equilibrium, `DeltaG=0` i.e., `DeltaH=TDeltaS`
or `T=(DeltaH)/(DeltaS)=(30,000J mol^(-1))/(105 JK^(-1)mol^(-1))=285.7 K`
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