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Assertion : For the change, H(2)O((l))ra...

Assertion : For the change, `H_(2)O_((l))rarr H_(2)O_((s)),DeltaH=DeltaU`.
Reason : No enthalpy change is involved in this process.

A

If both assertion and reason are true and reason is the correct explanation of assertion.

B

If both assertion and reason are true but reason is not the correct explanation of assertion

C

If assertion is true but reason is false.

D

If both assertion and reason are false.

Text Solution

Verified by Experts

The correct Answer is:
C
For the change, `H_(2)O_((l)) rarr H_(2)O_((s)),` there is negligible change in volume.
`therefore" "PDeltaV=Deltan_(g)RT ~~ 0`
Now, substituting the above value in eqn
`DeltaH=DeltaU + Deltan_(g)RT`
we get, `DeltaH=DeltaU`.
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