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For the gas phase reaction PCl(5)rarrP...

For the gas phase reaction
`PCl_(5)rarrPCl_(3)(g)+Cl_(2)(g)`
which of the following conditions are correct?

A

`DeltaH=0` and `DeltaS lt 0`

B

`DeltaHgt0` and `DeltaS gt 0`

C

`DeltaHlt0` and `DeltaS lt 0`

D

`DeltaHgt0` and `DeltaS lt 0`

Text Solution

Verified by Experts

The correct Answer is:
B
Since dissociation of `PCl_(5)` is an endothermic reaction, `DeltaH=+ve` i.e., `DeltaH gt 0`. The reaction is accompanied by randomness, `DeltaS gt 0`
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