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Acetic acid forms dimer in vapour phase....

Acetic acid forms dimer in vapour phase. The dimer is held together by two hydrogen bonds with a total strength of 66.5 kJ per mole of dimer. If at `25^(@)C`, the equilibrium constant for the dimerisation is `1.3xx10^(3)`. `DeltaS^(@)` for the reaction `2CH_(3)COOH hArr (CH_(3)COOH)_(2)` will be `(log 1.3=0.1139)`

A

`-0.163 kJ`

B

`-0.236 kJ`

C

`-0.342 kJ`

D

`-0.456 kJ`

Text Solution

Verified by Experts

The correct Answer is:
A
`DeltaG=-2.303 RT log K_(c)`
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