From the following `DeltaH^(@)` and `DeltaS^(@)` values, predict which of reactions I, II and III would be spontaneous at `25^(@)C`. `{:(,DeltaH^(@)(kJ),,DeltaS^(@)(J//K),),(I.,+10.5,,+30,),(II.,+1.8,,-113,),(III.,-126,,+84,):}`
A
III
B
I
C
II and III
D
I and II
Text Solution
Verified by Experts
The correct Answer is:
A
`DeltaG=DeltaH-TDeltaS` `DeltaG_(I)=10.5 xx 1000 -298xx30=1560` `DeltaG_(II)=1.8 xx 1000 + 298xx113=35474` `DeltaG_(IV)=-126xx1000-298xx84=-ve` III is spontaneous
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