1.

What is the sign of `DeltaG^(Theta)` and the values of `K` for an electrochemical cell for which `E^(Theta)underset(cell)` = 0.80volt`?A. `{:(DeltaG^(Theta),K),(-,gt1):}`B. `{:(DeltaG^(Theta),K),(+,gt1):}`C. `{:(DeltaG^(Theta),K),(+,lt1):}`D. `{:(DeltaG^(Theta),K),(-,lt1):}`

Answer» We know that
`DeltaG^(Theta) =- nFE^(Theta)`
When `E^(Theta) = 0.80`
Then `DeltaG^(Theta) =- ve`
and `K = antilog ((-(DeltaG^(@)))/(-2.303RT)) = antilog (+ve)`
`:. K gt 1`


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