{"term":{"id":"09018","title":"dimensionless Henry’s law solubility constant","longtitle":"IUPAC Gold Book - dimensionless Henry’s law solubility constant","doi":"10.1351\/goldbook.09018","code":"09018","status":"current","synonym":"<em>synonym<\/em>: dimensionless Henry solubility","definitions":[{"id":1,"text":"Amount concentration \\(c_{\\rm{l}}\\) of a species in the liquid phase divided by the amount concentration \\(c_{\\rm{g}}\\) of that species in the gas phase under equilibrium conditions at infinite dilution: \\[H_{\\rm{s}}^{cc}: = \\underset{c_{\\rm{l}} \\to 0}{\\rm{lim}}\\frac{c_{\\rm{l}}}{c_{\\rm{g}}}\\]","notes":{"1":"Instead of the amount concentrations \\(c_{\\rm{l}}\\) and \\(c_{\\rm{g}}\\), the mass concentrations \\(\\gamma_{\\rm{l}}\\) and \\(\\gamma_{\\rm{g}}\\) might be used here. This yields the same dimensionless Henry solubility because the molar mass \\(M\\) of the solute cancels out:\\(\\gamma_{\\rm{l}}\/\\gamma_{\\rm{g}} = (c_{\\rm{l}}M)\/(c_{\\rm{g}}M) = c_{\\rm{l}}\/c_{\\rm{g}}\\)"},"exams":{"1":"The dimensionless Henry solubility of ozone in water at \\(T = \\pu{298.15 K}\\) is \\(H_{\\rm{s}}^{cc}(\\ce{O3}) = 0.25\\)."},"contexts":{"1":"The dimensionless Henry solubility of ozone in water at <span title=\"numeric value with unit\">\\(T = \\pu{298.15 K}\\)<\/span> is <span title=\"quantity with value\">\\(H_{\\rm{s}}^{cc}(\\ce{O3}) = 0.25\\)<\/span>."},"links":[{"term":"Henry’s law solubility constant","url":"https:\/\/goldbook.iupac.org\/\/terms\/view\/09021"}],"sources":["PAC, 2022, 94, 71. 'Henry’s law constants (IUPAC Recommendations 2021)' on page 74 (https:\/\/doi.org\/10.1515\/pac-2020-0302)"]}],"altoutputs":{"html":"https:\/\/goldbook.iupac.org\/terms\/view\/09018\/html","xml":"https:\/\/goldbook.iupac.org\/terms\/view\/09018\/xml","plain":"https:\/\/goldbook.iupac.org\/terms\/view\/09018\/plain"},"citation":"Citation: 'dimensionless Henry’s law solubility constant' 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.09018","license":"The IUPAC Gold Book is licensed under Creative Commons Attribution-ShareAlike CC BY-SA 4.0 International (https:\/\/creativecommons.org\/licenses\/by-sa\/4.0\/) for individual terms.","collection":"If you are interested in licensing the Gold Book for commercial use, please contact the IUPAC Executive Director at executivedirector@iupac.org .","disclaimer":"The International Union of Pure and Applied Chemistry (IUPAC) is continuously reviewing and, where needed, updating terms in the Compendium of Chemical Terminology (the IUPAC Gold Book). Users of these terms are encouraged to include the version of a term with its use and to check regularly for updates to term definitions that you are using.","accessed":"2026-06-12T17:23:57+00:00"}}