Non-equilibrium reaction

{
  "id": "MLC-T-CHM-008021",
  "term": "Non-equilibrium reaction",
  "field": "Chemistry",
  "definition": "A reaction whose reactants are not initially distributed over their energy states according to a Boltzmann distribution, so the reacting molecules do not share a single temperature. Examples include reactions of hot atoms, of chemically activated molecules, and of reagents prepared in crossed molecular beams. Ordinary thermal reactions, by contrast, start from a Boltzmann distribution at one temperature.",
  "subject": "Physical and Biophysical Chemistry",
  "see_also": [
    "equilibrium reaction"
  ],
  "references": [
    "PAC, 1996, 68, 149. 'A glossary of terms used in chemical kinetics, including reaction dynamics (IUPAC Recommendations 1996)' on page 175 (https://doi.org/10.1351/pac199668010149)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/non-equilibrium-reaction/"
}