Difference in the potentials of electrodes on the right and left of a galvanic cell. When ΔV is positive, positive charge flows from left to right through the cell.
Note:
The limiting value of E cell for zero current flowing through the cell, all local charge transfer and chemical equilibria being established, was formerly called emf (@E01974@). The name @E01974@ and the symbol emf are no longer recommended, since a potential difference is not a force.
Sources:
Green Book, 3rd ed., p. 71 (https://doi.org/10.1039/9781847557889)
PAC, 1996, 68, 957. 'Glossary of terms in quantities and units in Clinical Chemistry (IUPAC-IFCC Recommendations 1996)' on page 971 (https://doi.org/10.1351/pac199668040957)