First-order phase transition

{
  "id": "MLC-T-CHM-004440",
  "term": "First-order phase transition",
  "field": "Chemistry",
  "definition": "A phase transition characterized by a discontinuity in the first derivatives of the Gibbs free energy with respect to temperature and pressure. This discontinuity manifests as abrupt changes in properties such as enthalpy, entropy, and specific volume at the transition point. Examples include melting, boiling, and sublimation, where latent heat is absorbed or released.",
  "synonyms": [
    "discontinuous phase transition"
  ],
  "subject": "Inorganic Chemistry",
  "see_also": [
    "enthalpy",
    "specific volume",
    "variable"
  ],
  "references": [
    "PAC, 1994, 66, 577. 'Definitions of terms relating to phase transitions of the solid state (IUPAC Recommendations 1994)' on page 583 (https://doi.org/10.1351/pac199466030577)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/first-order-phase-transition/"
}