Question

The cell potential, e°, for an oxidation-reduction reaction was found to equal 1.10 v. what can be said about this reaction? a. endothermic b. spontaneous c. nonspontaneous d. at equilibrium

Answer 1

When E* of a cell is positive, its G* (gibb's free energy) is negative.
For a reaction with negative G*, the reaction is said to be spontaneous.
Therefore it can be said that the given reaction is spontaneous in occurence .

Answer 2

Answer:  b. spontaneous

Explanation: The standard emf of a cell is related to Gibbs free energyby following relation:

$\Delta G=-nFE^0$

$\Delta G$ = gibbs free energy

n= no of electrons gained or lost

F= faraday's constant

$E^0$ = standard emf  = 1.10 V

when $\Delta G$= +ve, reaction is non spontaneous

$\Delta G$= -ve, reaction is spontaneous

$\Delta G$= 0, reaction is in equilibrium

Thus when $E^0$ is positive, $\Delta G$ is negative and thus reaction will be spontaneous.