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Standard enthalpy of vaporisationDeltaV(...

Standard enthalpy of vaporisation`DeltaV_(vap).H^(Theta)` for water at `100^(@)C`is`40.66kJmol^(-1)`.The internal energy of Vaporization of water at` 100^(@)C("in kJ mol"^(-1))`is

A

`+43.76`

B

`+40.66`

C

`+37.56`

D

`-43.76`

Text Solution

Verified by Experts

The correct Answer is:
C
`H_(2)O_((l))rarr H_(2)O_((g))`
`Delta H=Delta E+Delta` ng. RT
`40.66=Delta E+1xx8.314xx373xx10^(-3)`
`therefore Delta E=37.56 kJ mol^(-1)`
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