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Which of the following pairs of a chermi...

Which of the following pairs of a chermical reaction is centain to result in a spontaneous reaction ?

A

Exothermic and decreasesing disorder

B

Exothermic and increasesing disorder

C

Exothermic and increasesing disorder

D

Exothermic and decreasesing disorder

Text Solution

Verified by Experts

The correct Answer is:
B
If reaction is exothermic, therefore `DeltaH` is `-ve` and on increasing disorder, `DeltaS` is `+ve` , thus, at these conditions, `DeltaG` is negative according to the following equation.
`DeltaG=DeltaH-TDeltaS`
`Delta=-ve` , and for spontaneous reation `DeltaG` must `be-ve` .
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