Comparison of solubility parameters for alkane family obtained using cubic equation of state

The solubility parameters of ten chemicals belonging to alkane family, having carbon numbers in the range of 1–10, which are necessary for many chemical processes, were calculated and compared with the reference data. The solubility parameter was defined intrinsically as the square root of the cohesive energy density, which is the vaporizing energy per unit volume needed to remove a molecule from its nearest neighbor molecules. Then, the cohesive energy was correlated with the internal pressure derived from the cubic equation of state. The internal pressure concept solubility parameter was adapted to the alkane family and the numerical value was calculated as the colligative property as a function of the temperature and pressure. The validity of the calculated solubility parameters was confirmed within the error tolerance by comparing them with the reference data. The solubility parameters were fitted in three dimensional coordinates with the pressure and temperature and the deviation between each equation of state and the reference data was analyzed.