| 释义 |
Nernst equation
Nernst equation[′nernst i‚kwā·zhən] (physical chemistry) The relationship showing that the electromotive force developed by a dry cell is determined by the activities of the reacting species, the temperature of the reaction, and the standard free-energy change of the overall reaction. Nernst equation
Nernst e·qua·tion (nārnst), the equation relating the equilibrium potential of electrodes to ion concentrations; the equation relating the electrical potential and concentration gradient of an ion across a permeable membrane at equilibrium: E = [RT / nF] [ln (C1/C 2)], where E = potential, R = absolute gas constant, T = absolute temperature, n = valence, F = the Faraday, ln = the natural logarithm, and C1 and C2 are the ion concentrations on the two sides; in nonideal solutions, concentration should be replaced by activity.
See also: activity (2). Nernst e·qua·tion (nernst ĕ-kwā'zhŭn) The equation relating the equilibrium potential of electrodes to ion concentrations; the equation relating the electrical potential and concentration gradient of an ion across a permeable membrane at equilibrium: E = [RT/nF] [ln (C1/C2)], where E = potential, R = absolute gas constant, T = absolute temperature, n = valence, F = the Faraday, ln = the natural logarithm, and C1 and C2 are the ion concentrations on the two sides; in nonideal solutions, concentration should be replaced by activity.
See also: activity (2) Nernst, Walther, German physicist and Nobel laureate, 1864-1941. Nernst equation - the equation relating the electrical potential and concentration gradient of an ion across a permeable membrane at equilibrium.Nernst potentialNernst theory - that the passage of an electric current through tissues causes a dissociation of the ions. |