The estimation of solubility parameters and related properties of liquids

Abstract

Abstract The characteristic pressure, P x (=4.455×10 9 Nm −2 ), appears to be the same for all unassociated liquids, and the characteristic volume, V x , may be found by the addition of atomic factors. The van der Waals constant a , latent heat of evaporation Δ 1 g H E and solubility parameter can all be estimated for such liquids, since a , Δ(Δ) g H E ‐RT) V and δ V equal F x 1/2 V x /3, where T is the temperature, R is the gas constant, and V =M/(∂ L0 ‐∂ g0 ): M is the molecular mass; ∂ L0 is the density of the liquid and ∂ g0 the vapour density. Molecular attraction constants used for the estimation of solubility parameters can be obtained by the multiplication of V x by the constant P x 1/2 /3.