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.
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 name electromotive force
and the symbol emf
are no longer recommended, since a potential difference is not a force.
PAC, 1996, 68, 957
(Glossary of terms in quantities and units in Clinical Chemistry (IUPAC-IFCC Recommendations 1996))
on page 971
IUPAC. Compendium of Chemical Terminology, 2nd ed. (the "Gold Book"). Compiled by A. D. McNaught and A. Wilkinson. Blackwell Scientific Publications, Oxford (1997). XML on-line corrected version: http://goldbook.iupac.org (2006-) created by M. Nic, J. Jirat, B. Kosata; updates compiled by A. Jenkins. ISBN 0-9678550-9-8. doi:10.1351/goldbook