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If DeltaH("vaporisation") of substance X...

If `DeltaH_("vaporisation")` of substance X (l) (molar mass :30 g/mol) is 300 J/g at it's boiling piont 300K, then
molar entropy change for reversible conddensation process is

A

`30 J//mol. K`

B

`-300 J//mol.K`

C

`-30 J//mol.K`

D

None of these

Text Solution

Verified by Experts

The correct Answer is:
C
`DeltaS_(vap) = + (300 xx 30)/(300)= - 30 J//"mol.K"`
`DeltaS_(cond) = - 30 J//"mol.K"`
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