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For the reaction : PCl(5) (g) rarrPCl(3)...

For the reaction : `PCl_(5) (g) rarrPCl_(3) (g) +Cl_(2)(g)`:

A

`Delta H = Delta E`

B

`Delta H gt Delta E`

C

`Delta H lt Delta E`

D

None of these

Text Solution

Verified by Experts

The correct Answer is:
B
`Delta H = Delta E + pDelta V = Delta E + n_(g) RT`
`pCl_(6) to pCl_(3)(g) + Cl_(2)(g)`
`DeltaN_(g) = n_((p)_(g)) - n_((x)-(g)) = 2 - 1 = 1`
`:. " "DeltaH = Delta E + 1 xx RT " " :. " "Delta H > Delta E`.
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