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what will be the change of entropy Delta...

what will be the change of entropy `Delta_(r)S^(@)at 298 K` for the reaction in which urea is formed from `NH_(3) and CO_(2)` ?
`2NH_(3)(g)+ CO_(2)(g) to NH_(2)CONH_(2)(aq)+H_(2)O(l)`
[given ,the standard entropy of ` NH_(2)CONH_(2)(aq)` ,
` CO_(2)(g), NH_(3)(g)and H_(2)O(l)are 174.0 , 213. 7, 192.3 and 69.9 JK^(-1)mol^(-1)` respectively]

A

` 200 JK^(-1) mol ^(-1)`

B

`-35.44JK^(-1) mol^(-1)`

C

`-354.4 JK^(-1) mol ^(-1)`

D

`425.2 JK^(-1) mol^(-1)`

Text Solution

Verified by Experts

The correct Answer is:
a
for the given change ` Delta_(r)S^(@)= sumn_(p)S_(p)^(@)- sumn_(R)S_(R)^(@)`
`S_(NH_(2)CONH_(2))^(@)+ S_(H_(2)O)^(@)-[2xxS_(NH_(3))^(@)+ S_(CO_(2))^(@)]`
` 174.0 + 69.9 -[2xx192.3+213.7]`
`354.4 JK^(-1)mol^(-1)`
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