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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

`Delta H lt 0 and DeltaS lt 0`

B

`DeltaH gt 0 and DeltaS lt 0`

C

`DeltaH =0 and DeltaS lt0`

D

`Delta H gt 0 and DeltaSgt0`

Text Solution

Verified by Experts

The correct Answer is:
D
`PCl_(5)(g)hArr PCl_(3)(g)+Cl_(2)(g)`
`DeltaH=DeltaE=DeltanRT`
Here, `Deltan` = Change in number of moles of product and reactant
As `Deltan=+ve," so "DeltaH=+ve`
`DeltaS=S_("product")-S_("reactant")`
`DeltaS=+ve`
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