Kelvin

{
  "id": "MLC-T-CHM-006312",
  "term": "Kelvin",
  "field": "Chemistry",
  "definition": "The SI base unit of thermodynamic temperature, symbol K, set since 2019 by assigning the Boltzmann constant the exact value 1.380649 × 10⁻²³ in the unit joule per kelvin. Temperatures on this absolute scale start at 0 K, absolute zero, and a temperature difference of one kelvin equals one degree Celsius. The triple point of water, 273.16 K, was the defining fixed point until 2019.",
  "subject": "Physical and Biophysical Chemistry",
  "see_also": [
    "Planck constant",
    "Boltzmann constant",
    "speed of light in a vacuum"
  ],
  "references": [
    "BIPM, The International System of Units, SI Brochure, 9th ed. (2019), p. 133 (https://www.bipm.org/en/publications/si-brochure/)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/kelvin/"
}