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For a reaction aA(g)hArrbB(g) at eq...

For a reaction
`aA(g)hArrbB(g)`
at equilibrium, the heat of reaction at constant volume is `1500` cal more than at constant pressure. If the temperature is `27^(@)C` then

A

`K_(p)=K_(c )`

B

`K_(p) gt K_(c )`

C

`K_(p) lt K_(c )`

D

None of these

Text Solution

Verified by Experts

The correct Answer is:
B
Since `DeltaU gt DeltaH rArr Deltan_(g) lt0, [:' DeltaH=DeltaU+Deltan_(g)RT]`
Also, `K_(p)/K_(c )=(RT)^(Deltan_(g))` and `RT gt 1, [[R=,0.0821],[T=,300 K]]`
`rArr K_(p) lt K_(c )`
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