Extent of reaction

{
  "id": "MLC-T-CHM-004265",
  "term": "Extent of reaction",
  "field": "Chemistry",
  "definition": "A quantity that measures how far a chemical reaction has advanced, defined by the change dxi = dn(i) / nu(i), where dn(i) is the change in the amount of any reactant or product and nu(i) is its stoichiometric number, negative for reactants. It is an extensive quantity with the SI unit mole, and it is zero at the start. Dividing it by its maximum possible value gives the dimensionless degree of reaction.",
  "synonyms": [
    "advancement"
  ],
  "subject": "Physical and Biophysical Chemistry",
  "see_also": [
    "Avogadro constant",
    "extensive quantity",
    "amount of substance",
    "stoichiometric number"
  ],
  "references": [
    "Green Book, 2nd ed., p. 43 (https://goldbook.iupac.org/files/pdf/green_book_2ed.pdf)",
    "PAC, 1992, 64, 1569. 'Quantities and units for metabolic processes as a function of time (IUPAC Recommendations 1992)' on page 1572 (https://doi.org/10.1351/pac199264101569)",
    "PAC, 1993, 65, 2291. 'Nomenclature of kinetic methods of analysis (IUPAC Recommendations 1993)' on page 2295 (https://doi.org/10.1351/pac199365102291)",
    "PAC, 1996, 68, 149. 'A glossary of terms used in chemical kinetics, including reaction dynamics (IUPAC Recommendations 1996)' on page 165 (https://doi.org/10.1351/pac199668010149)",
    "PAC, 1996, 68, 957. 'Glossary of terms in quantities and units in Clinical Chemistry (IUPAC-IFCC Recommendations 1996)' on page 973 (https://doi.org/10.1351/pac199668040957)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/extent-of-reaction/"
}