Gibbs-Konovalov equations

{
  "id": "MLC-T-CHM-004883",
  "term": "Gibbs-Konovalov equations",
  "field": "Chemistry",
  "definition": "A pair of equations for a binary mixture that relate changes in temperature, pressure and composition in one phase to those in a coexisting equilibrium phase of different composition, such as a vapour in equilibrium with a liquid. They show that the temperature-composition or pressure-composition curve has an extremum, with zero slope, where the two phases have equal compositions, as at an azeotrope. The relations follow from the Gibbs-Duhem equation applied to each phase.",
  "synonyms": [
    "Gibbs-Konovalow equations",
    "van der Waals’ equations"
  ],
  "subject": "Analytical Chemistry",
  "see_also": [
    "mixture"
  ],
  "references": [
    "PAC, 2008, 80, 233. 'Glossary of terms related to solubility (IUPAC Recommendations 2008)' on page 248 (https://doi.org/10.1351/pac200880020233)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/gibbs-konovalov-equations/"
}