Answer to Question #243424 in General Chemistry for Clayton Kwok

Question

So I am learning about standard cell potential E°, and my question is that in a reaction of redox reaction there is a E° and usually the reaction is reversible and so if it is reversible does the value of E° change to positive or negative if we reversed the reaction?

Answer 1

If the value of E°cell is negative, then the reaction is not spontaneous, and it will not occur as written under standard conditions; it will, however, proceed spontaneously in the opposite direction. A negative E°cell means that the reaction will proceed spontaneously in the opposite direction