Influence of thermodynamic variables and molecular parameters in the solubility of gases in liquids
A semiempirical procedure based upon measurements of solubility over a reduced temperature range and the use of a perturbation method with a hard-sphere reference fluid, is able to describe satisfactorily the thermodynamics of dissolution of nonpolar gases in water over all the temperature range and for gas pressures up to 50 MPa. The procedure can also be applied to systems constituted by anisotropic molecules, either sphericallizing the intermolecular potential or employing the interaction site model, The possibility of extending these ideas to deal with the dissolution of gases exhibiting larger intermolecular interactions with the solvent is explored.