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Which statements in each of the followin...

Which statements in each of the following paris would you except to have the higher standard molar entropy?
(I) `C_(2)H_(2)(g)` or `C_(2)H_(6)`(g), (II) `CO_(2)(g)` or CO(g), (III) `I_(2)`(s) or `I_(2)` (g)
The correct choice is:

A

`C_(2)H_(2)(g), CO_(2)(g), I_(2)(g)`

B

`C_(2)H_(6)(g), CO_(2)(g), I_(2)(g)`

C

`C_(2)H_(2)(g), CO_(2)(g), I_(2)(g)`

D

`C_(2)H_(6)(g),CO_(2)(g), I_(2)(g)`

Text Solution

Verified by Experts

The correct Answer is:
D
Large the molecule, more is entropy. Also, Entropy of a molecule is larger in gaseous state them in solid state.
`rArr S_(C_(2)H_(2)) lt S_(C_(2)H_(6)) , S_(CO_(2)) gt S_(CO) , S_(I_(2))(s) lt S_(I_(2))(g)`
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