In a recent study, a two-dimensional solubility parameter model was used to correlate the heat of solution for Solutes ranging from n-alkanes to alcohols, dissolved in isotatic polypropylene (PP), poly(ethyl ethylene) (PEE), and poly(dimethylsiloxane) (PDMS). When literature data Of solubility parameter components of solutes were used, the correlation had some scattering for solutes with low values of cohesive energy density. In this study, the components Of solubility parameters of solutes and polymers were estimated from cohesive energy and heat of sorption Of solutes. Good correlation was obtained for the specific heat of sorption (Delta U-sorp/V) for Solutes ranging from n-alkanes to alcohols, and PDMS had a polar component as previously estimated. Free volume effect in solution process may be the Source of a small systematic deviation from the model. (C) 2009 Wiley Periodicals, Inc. J Appl Polym Sci 112: 2027-2032, 2009