Helmholtz free energy

{
  "id": "MLC-T-MET-006223",
  "term": "Helmholtz free energy",
  "field": "Meteorology and atmospheric science",
  "definition": "A thermodynamic potential that measures the maximum reversible work obtainable from a closed system at a constant temperature and constant volume. It is defined as the internal energy of the system minus the product of its temperature and entropy (A = U − TS). In atmospheric thermodynamics, it is less frequently applied than Gibbs free energy, which is defined for constant pressure and temperature conditions more typical of the atmosphere.",
  "synonyms": [
    "Helmholtz function",
    "work function"
  ],
  "see_also": [
    "Gibbs function"
  ],
  "url": "https://mlchart.com/terminology/meteorology/helmholtz-free-energy/"
}