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Entropy change involve in conversation o...

Entropy change involve in conversation of `1`mole of liquid water at `373K`to vapour at the same temperature (latent heat of vaporisation of water=`2.257kJg^(-1))`

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For the conversion of water `rarr` vapour , the entropy change is given by
`Delta_(vap) S = (Delta_(vap) H)/( T_(b))`
Here, `Delta_(vap) H = 2.257 kJ //g = 2.257 xx18 kJ //mol = 40.626 kJ //mol, T_(b) = 373 K`
`:. Delta _(vap ) S = (40.626k J mol^(-1))/( 373K) = 0.1089K J K^(-1) mol^(-1) = 108.9 J K^(-1) mol^(-1)`
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