Question

Entropy of vaporisation of water at `100^(@)C`, if molar heat of vaporisation is `9710 cal mol^(-1)` will be
A. `20 cal mol^(-1)K^(-1)`
B. `26 cal mol^(-1)K^(-1)`
C. `24 cal mol^(-1)K^(-1)`
D. `28 cal mol^(-1)K^(-1)`

Answer 1

Correct Answer - D
`DeltaS_(vap)=DeltaH_(vap)//T_(b)=9710//373`
`=26.032 cal K^(-1) mol^(-1)`