Henry’s law constants (IUPAC Recommendations 2021)
Rolf Sander, William E. Acree, Alex De Visscher, Stephen E. Schwartz, and Timothy J. Wallington
Pure and Applied Chemistry, 2022
Vol. 94, no. 1, pp. 71-85
https://doi.org/10.1515/pac-2020-0302
Henry’s law states that the abundance of a volatile solute dissolved in a liquid is proportional to its abundance in the gas phase. It applies at equilibrium and in the limit of infinite dilution of the solute. For historical reasons, numerous different definitions, names, and symbols are used in the literature to express the proportionality coefficient, denoted the “Henry’s law constant”. Here, a consistent set of recommendations is presented. An important distinction is made between two new recommended reciprocal quantities: “Henry’s law solubility constant” (Hs) and “Henry’s law volatility constant” (Hv). Eight recommended variants of Hs and Hv are described and relations among them presented.
©2022 IUPAC & De Gruyter. This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License. For more information, please visit: http://creativecommons.org/licenses/by-nc-nd/4.0/
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