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The entropy if vaporisation of benzene i...

The entropy if vaporisation of benzene is `85JK^(-1) mol^(-1)`. When 117g benzene vaporizes at its's normal boiling point, the entropy change in surrounding is:

A

`-85 JK^(-1)`

B

`-85xx1.5 JK^(-1)`

C

`85 xx1.5 JK^(-1)`

D

None of these

Text Solution

Verified by Experts

The correct Answer is:
B
`n_(C_(6)H_(6))=(117)/(78)=1.5`
`" "DeltaS_("system")=1.5 xx85 J//K`
`therefore" "DeltaS_("surrounding")=-1.5 xx85 J//K`
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