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Delta H (vap) for water is 40.7 kJ mol^(...

`Delta H` (vap) for water is `40.7 kJ mol^(-1)`. The entropy of vaporisation of water is :

A

`- 40.7 kJ mol^(-1) K^(-1)`

B

`407 J mol^(-1) K^(-1)`

C

`109 J mol^(-1) K^(-1)`

D

`722 J mol^(-1)`

Text Solution

Verified by Experts

The correct Answer is:
C
`Delta S = (Delta_("vap") H)/(T_(b)) = (40.7 xx 10^(3))/(373)`
`= 109 JK^(-1) mol^(-1)`
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