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Standard enthalpy of vaporisation, Delta...

Standard enthalpy of vaporisation, `Delta_(vap)H^theta` for water at `100^@C` Is `40.66 kJ mol^-1`. The internal energy of vaporisation of water at `100^@C` (in kJ `mol^-1`)is (Assume water vapour to behave like an ideal gas).

A

`+37.56`

B

-43.76

C

`+43.76`

D

`+40.66`

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The correct Answer is:
A
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