Volumetric properties of binary liquid mixtures: Application of the Prigogine Flory Patterson theory to excess molar volumes of dichloromethane with benzene or toluene
The values of the density were measured for binary liquid mixtures of benzene and toluene with dichloromethane over entire range of concentration using a vibrating-tube densimeter at T = (288.15, 293.15, 298.15, and 303.15) K and atmospheric pressure. The excess molar volumes, calculated from the density results, are positive for the systems of dichloromethane with benzene over the whole concentration range and present an approximate sigmoid curve for the dichloromethane with toluene. The VE m values have been fitted to the Redlich Kister polynomial equation, and other volumetric properties such as the partial molar volumes, Vi , the apparent molar volume, V/i, and the partial molar excess volumes at infinite dilution, oVEi P1, were calculated over the whole composition range. The Prigogine Flory Patterson (PFP) theory and its applicability in predicting VE m at T = 298.15 K are tested. Good agreement was found for the mixtures dichloromethane with benzene. For the mixtures dichloromethane with toluene, which shows an approximate S-shaped VE m behaviour, the correlation fails.
Compounds
#
Formula
Name
1
CH2Cl2
dichloromethane
2
C6H6
benzene
3
C7H8
toluene
Datasets
The table above is generated from the ThermoML associated json file (link above).
POMD and RXND refer to PureOrMixture and Reaction Datasets. The compound numbers are included in properties, variables, and phases, if specificied;
the numbers refer to the table of compounds on the left.