defined via molality and partial pressure
symbol: $H_{\rm{s}}^{bp}$, unit: $\pu{mol m-3 Pa-1}$
symbol: $H_{\rm{s}}^{bp}$, unit: $\pu{mol m-3 Pa-1}$
https://doi.org/10.1351/goldbook.09026
Molality \(b\) of a species divided by the partial pressure \(p\) of that species in the gas phase under equilibrium conditions at infinite dilution: \[H_{\rm{s}}^{bp}: = \underset{b \to 0}{\rm{lim}}\frac{b}{p}\]
Notes:
- The coherent SI unit for \(H_{\rm{s}}^{bp}\) is \(\pu{mol m-3 Pa-1}\).
- Here, the symbol \(b\) is used for molality (instead of \(m\)) to avoid confusion with the symbol \(m\) for mass.
- Molality refers to the mass of solvent and should not be confused with content which refers to the mass of solution.
Example: The Henry solubility of ozone in water at \(T = \pu{298.15 K}\) is \(H_{\rm{s}}^{bp}(\ce{O3}) = \pu{1.0E-7 mol kg-1 Pa-1}\).
See also: Henry’s law solubility constant