Compute electrode potential E = E° − (R·T / n·F)·lnQ under non-standard conditions.
输入标准电势、电子数 n、反应商 Q 与温度,求实际电极电势。
| Quantity | Value | Unit | Source |
|---|---|---|---|
| Gas constant R | 8.314462618 | J/(mol·K) | CODATA 2018 |
| Faraday constant F | 96485.33212 | C/mol | CODATA 2018 (e×N_A) |
| 25 °C slope 2.303RT/F | 0.05916 | V | at 298.15 K |
| ln(10) | 2.302585 | — | mathematical constant |
| Item | Formula / Note | Source / Standard |
|---|---|---|
| Nernst equation | E = E° - ( R · T / ( n · F ) ) · ln Q | Nernst W. (1889), Die elektromotorische Wirksamkeit der Ionen |
| Common form at 25 °C | E = E° - ( 0.05916 / n ) · log10 Q | Atkins PW, de Paula J, Physical Chemistry, Oxford Univ. Press |
| Relation to the equilibrium constant | At equilibrium E = 0 and Q = K, so E° = ( R · T / ( n · F ) ) · ln K | Atkins PW, de Paula J, Physical Chemistry |
| Faraday constant | F = 96485.33212 C/mol, a CODATA recommended value | IUPAC, Quantities, Units and Symbols in Physical Chemistry (Green Book) |