Factor used to convert experimentally determined Henry’s law constants at the saturation vapor pressure of the solvent \(\ce{A}\), \(p_{\ce{A}}^{\ast}\), to a reference pressure \(p\) \[\begin{array}{c} I_{\rm{p}} = \int_{p_{\ce{A}}^{\ast}}^p \frac{V_{\ce{B}}^{\infty {\rm{l}}}}{RT}{\rm{d}}p \\ k_{\rm{H},\ce{B}}(p) = k_{\rm{H},\ce{B}}(p^{\ast}) \exp \left[I_{\rm{p}}(p) \right]\end{array}\] is the partial molar volume of liquid \(\ce{B}\) at infinite dilution in solvent \(\ce{A}\). The second equation gives the relation between the two Henry’s law constants.