Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7841818 | Journal of Molecular Liquids | 2018 | 62 Pages |
Abstract
The excess molar volumes, VE, excess molar isentropic compressibilities, Îs,mE, viscosity deviations, Îη and Gibbs free energies of activation, ÎGâ have been determined by using the experimentally measured values of densities, Ï, speeds of sound, u, and viscosities, η of pure 1-ethyl-3-methylimidazolium trifluoromethanesulfonate ([EMIM][CF3SO3]), ethylene glycol (EG) and N,N-dimethylformamide (DMF) and of binary mixtures [EMIM][CF3SO3]â¯+â¯EG/DMF; EGâ¯+â¯DMF in the mole fraction range (x1) from 0 to 1 and of ternary mixture [EMIM][CF3SO3]â¯+â¯DMFâ¯+â¯EG in the range of x1 from 0.03 to 0.8 at temperatures, (298.15, 303.15, 308.15, 313.15, 318.15 and 323.15) K and pressure 0.1â¯MPa. The VE, Îs,mE and Îη values of binary systems have been correlated with Redlich-Kister polynomial equation. The VE, Îs, mE and Îη values of ternary system have been correlated with Cibulka equation. The variations of measured data with composition and temperature are discussed in terms of ion-ion, ion-dipole and dipole-dipole interactions prevailing in the mixtures. We have also applied a number of semiempirical relations for correlation/prediction of our experimental dynamic viscosity data and evaluated some interactional parameters of studied binary mixtures. The excess molar volumes of each binary system have also been correlated to the Prigogine-Flory-Patterson (PFP) theory.
Related Topics
Physical Sciences and Engineering
Chemistry
Physical and Theoretical Chemistry
Authors
Naushad Anwar, Riyazuddeen Riyazuddeen, Fatima Urooj,