https://doi.org/10.1351/goldbook.E01934
Difference in the potentials of electrodes on the right and left of a galvanic cell. When is positive, positive charge flows from left to right through the cell.
Note:
The limiting value of for zero current flowing through the cell, all local charge transfer and chemical equilibria being established, was formerly called emf (
The limiting value of
electromotive force
). The name electromotive force
and the symbol emf are no longer recommended, since a potential difference is not a force.