Question

What is the meaning of a positive sign for a cell potential?

Answer 1

Hint: In the given question we will discuss on the cell potential. Along with the signs of the cell potential which indicate how the reaction is taking place, as the Cell potential might refer to the Electrode potential of the ongoing reaction.

Complete answer:
The batteries in our remote, toys, appliances and also the engine in our car are only a couple of examples of how chemical reactions did create the power through their flow of electrons. The cell potential is the way in which we can measure how much voltage exists between the two half cells of a battery. The standard cell potential denoted as E° cell, can be defined as the potential of a cell measured beneath standard conditions that might be with all kind in their standard states that can be 1 M for solutions, so the Concentrated solutions of salts will be about 1 M generally do not show ideal behavior, and so the actual standard state corresponds to an activity of 1 rather than a concentration of 1 M.
Positive sign for a cell potential means that the reaction can proceed as written, if it is negative.
So, the reaction will not occur spontaneously if the cell potential is positive.
$E_{cell}=E_{cathode}-E_{anode}$

Note: The cell potential, denoted as $E_{cell}$ , is the measure of the potential difference between two half cells inside an electrochemical cell. The potential difference is caused by the ability of electrons to flow from one half cell to the other.