Entropy

{
  "id": "MLC-T-CHM-003964",
  "term": "Entropy",
  "field": "Chemistry",
  "definition": "A thermodynamic state function that quantifies the degree of disorder or randomness within a system. It measures the number of possible microscopic arrangements corresponding to a given macroscopic state. Entropy tends to increase in isolated systems over time, as described by the second law of thermodynamics, and is typically measured in joules per kelvin (J/K).",
  "subject": "Physical and Biophysical Chemistry",
  "see_also": [
    "Boltzmann constant"
  ],
  "references": [
    "Green Book, 2nd ed., p. 48 (https://goldbook.iupac.org/files/pdf/green_book_2ed.pdf)",
    "PAC, 1990, 62, 2167. 'Glossary of atmospheric chemistry terms (Recommendations 1990)' on page 2187 (https://doi.org/10.1351/pac199062112167)",
    "PAC, 1996, 68, 957. 'Glossary of terms in quantities and units in Clinical Chemistry (IUPAC-IFCC Recommendations 1996)' on page 972 (https://doi.org/10.1351/pac199668040957)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/entropy/"
}