Title: enthalpy of wetting
Long Title: IUPAC Gold Book - enthalpy of wetting
DOI: 10.1351/goldbook.E02144
Status: current

Definition
Referred to unit of mass of the solid, the difference (at constant temperature) between the enthalpy of a solid completely immersed in a wetting liquid, and that of the solid and the liquid taken separately. It must be specified whether the solid in the initial state is in contact with vacuum or with the vapour of the liquid at a given partial pressure. Measurements of the enthalpy of wetting of a solid equilibrated with varying relative pressures of the vapour of a pure wetting liquid may be used to derive the differential enthalpy of adsorption of the vapour.

Related Terms
- enthalpy: https://goldbook.iupac.org//terms/view/E02141
- partial pressure: https://goldbook.iupac.org//terms/view/P04420
- wetting: https://goldbook.iupac.org//terms/view/WT07250

Source
- PAC, 1972, 31, 577. 'Manual of Symbols and Terminology for Physicochemical Quantities and Units, Appendix II: Definitions, Terminology and Symbols in Colloid and Surface Chemistry' on page 605 (https://doi.org/10.1351/pac197231040577)

Other Outputs
- html: https://goldbook.iupac.org/terms/view/E02144/html
- json: https://goldbook.iupac.org/terms/view/E02144/json
- xml: https://goldbook.iupac.org/terms/view/E02144/xml

Citation: Citation: 'enthalpy of wetting' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. 10.1351/goldbook.E02144
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Accessed: 2026-07-25T11:25:20+00:00