The reaction is spontaneous if the cell potential is

Explanation

The spontaneity of a redox reaction in an electrochemical cell is determined by the cell potential (Ecell). The cell potential is the difference in electric potential between the two half-cells in the electrochemical cell. The sign of the cell potential is crucial in predicting the spontaneity of the reaction.If the cell potential (Ecell) is positive, it indicates that the reaction is thermodynamically favorable, and the reaction will occur spontaneously. In other words, a positive cell potential suggests that the products of the reaction are at a lower energy state than the reactants.