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Assuming that water vapour is an ideal g...

Assuming that water vapour is an ideal gas, the internal energy change `(Delta U)` when `1 mol` of water is vapourised at `1` bar pressure and `100^(@)C`, (Given: Molar enthalpy of vapourization of water at `1` bar and `373K=41 kJ mol^(-1)` and `R=8.3J mol^(-1)K^(-1)`) will be:

A

`41kJmol^(-1)`

B

`4.1kJmol^(-1)`

C

`3.7904kJmol^(-1)`

D

`37.904kJmol^(-1)`

Text Solution

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The correct Answer is:
D
`DeltaH=DeltaU+DeltanRT`
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