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Cell reactiomn is spontaneous when...

Cell reactiomn is spontaneous when

A

`E_(red)^(@)` is negative

B

`E_(red)^(@)` is positive

C

`DeltaG^(@)` is negative

D

`DeltaG^(@)` is positive

Text Solution

Verified by Experts

The correct Answer is:
C
( c) When the value of `DeltaG^(@)` is negative, the cell reaction is spontaneous.
` DeltaG^(@)=-nFE^(@)`
where, n= number of electrons take part
F=Faraday constant
`E^(@)`=EMF of the cell
Thus, for a spontaneous reaction, the EMF of the cell must be positive.
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