Thermodynamics Research Center / ThermoML | Fluid Phase Equilibria

ABSTRACT

Excess volume, excess isentropic compressibility and deviation in viscosity were studied for eight binary systems of dimethylacetamide (DMA) with 1,2-dichlorobenzene, 1,3- dichlorobenzene, 1,2,4- trichlorobenzene, o-chlorotoluene, m-chlorotoluene, p-chlorotoluene, o-nitrotoluene and m-nitrotoluene in the entire composition range at 303.15 K and atmospheric pressure. Excess volume data for the studied mixtures were measured directly using a single composition loading type dilatometer and compared with predictive expressions proposed by Redlich-Kister and Hwang. Moreover, the excess volume data in the present investigation were analyzed by using Prigogine-Flory- Patterson (PFP) theory. The speed of sound data were measured with a single crystal interferometer at a frequency of 3 MHz and data were analyzed in terms of Free Length Theory (FLT) and Collision Factor Theory (CFT). Experimental viscosity data were measured by a suspended Ubbelohode-type viscometer, which in turn used to calculate deviation in viscosity and interaction parameters for various models such as Gruenberg-Nissan, Tamura and Kurata and Hind et al. The experimental data were discussed on the basis of intermolecular interactions between unlike molecules