The densities, q and refractive index, nD of (1,2-dichloroethane + benzene, +bromobenzene, +chlorobenzene, and +nitrobenzene) have been measured for the whole range of composition at temperature ranging from (293.15 to 333.15) K in T = 10 K intervals and ambient pressure (81.5 kPa), using Anton Paar DMA 4500 oscillating densimeter and Anton Paar Abbemat 500 automatic refractometer. From experimental values, excess molar volumes VE m, partial molar volumes Vi , apparent molar volumes V/i and refractive index deviations DnD of binary systems were calculated and VE m and DnD were correlated with the Redlich–Kister polynomial. The effect of temperature and benzene ring derivatives on the excess molar volumes and refractive index deviations are discussed in terms of molecular interaction between unlike molecules. The excess molar volumes are positive for 1,2-dichloroethane with benzene and its derivatives and it was found that VE m in the systems increase with increasing temperature. A comparative study has been made of the refractive indices obtained experimentally and those calculated by means of the Lorentz–Lorenz and Gladstone–Dale relations .The perturbed chain statistical associating fluid theory (PC-SAFT) was also applied to correlate and predict the density of mixtures.
