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Assertion: The increase in internal ener...

Assertion: The increase in internal energy `(DeltaE)` for the vaporisation of 1 mole of water at 1 atm and `373K` is zero.
Reason: For all isothermal processes `DeltaE=0` .

A

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

B

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

C

If assertion is true but reason is false.

D

If the assertion and reason both are false.

Text Solution

Verified by Experts

The correct Answer is:
B
`N_(2)(g) + O_(2)(g) hArr 2NO(g)`
We know that `Delta H= Delta E+ Delta n RT`
`Delta n=2 -2 = 0` hence, `Delta nRT= 0`
Therefore, `Delta H= Delta E`
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