Diffusion coefficient

{
  "id": "MLC-T-CHM-003194",
  "term": "Diffusion coefficient",
  "field": "Chemistry",
  "definition": "A proportionality constant that relates the molar flux of a substance to its concentration gradient, as described by Fick's first law of diffusion. It quantifies the rate at which a substance spreads out due to random molecular motion. The standard unit for the diffusion coefficient is square meters per second (m²/s).",
  "subject": "Physical and Biophysical Chemistry",
  "see_also": [
    "amount of substance",
    "concentration gradient",
    "flux"
  ],
  "references": [
    "Green Book, 2nd ed., p. 65 (https://goldbook.iupac.org/files/pdf/green_book_2ed.pdf)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/diffusion-coefficient/"
}