Enthalpy

{
  "id": "MLC-T-CHM-003954",
  "term": "Enthalpy",
  "field": "Chemistry",
  "definition": "A thermodynamic property of a system, representing its total heat content. It is defined as the sum of the system's internal energy and the energy derived from its pressure and volume. The change in enthalpy (ΔH) during a process at constant pressure is equal to the heat absorbed or released by the system, with a negative value indicating an exothermic reaction.",
  "subject": "Physical and Biophysical Chemistry",
  "see_also": [
    "internal energy"
  ],
  "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/enthalpy/"
}