Lippman's equation

{
  "id": "MLC-T-CHM-006672",
  "term": "Lippman's equation",
  "field": "Chemistry",
  "definition": "A thermodynamic relationship that describes the change in interfacial tension at an electrode-electrolyte interface as a function of the applied potential. It relates the electrocapillary curve to the surface excess of charged species at the interface. This equation is derived from the Gibbs adsorption isotherm and is expressed as dγ = -σ dE, where γ is the interfacial tension, σ is the surface charge density, and E is the electrode potential.",
  "subject": "Physical and Biophysical Chemistry",
  "see_also": [
    "chemical potential",
    "electric charge",
    "interface",
    "reference electrode",
    "surface excess",
    "thermodynamic temperature"
  ],
  "references": [
    "PAC, 1974, 37, 499. 'Electrochemical nomenclature' on page 508 (https://doi.org/10.1351/pac197437040499)",
    "PAC, 1986, 58, 437. 'Interphases in systems of conducting phases (Recommendations 1985)' on page 445 (https://doi.org/10.1351/pac198658030437)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/lippman-s-equation/"
}