Thermodynamic properties of ternary mixtures containing 1-ethyl-3-methylimidazolium tetrafluoroborate with cyclic amides and cyclopentanone or cyclohexanone at T = (293.15, 298.15, 303.15 and 308.15) K

•The measured ρijkρijk and uijkuijk data of the studied mixtures have been used to determine VijkE and κSEijk.•The VijkE and κSEijk data have been fitted to Redlich–Kister equation.•The VijkE and κSEijk data has been analyzed in terms of Graph and PFP theories.•It has been observed that Graph theory describe well the VijkE and κSEijk values.

The density, ρijk and speed of sound, uijk of ternary {1-ethyl-3-methylimidazolium tetrafluoroborate (i) + pyrrolidin-2-one} or {1-methyl pyrrolidin-2-one (j) + cyclopentanone or cyclohexanone (k)} mixtures have been measured at temperatures (293.15, 298.15, 303.15, 308.15) K. The excess molar volume, VijkE and excess isentropic compressibility, κSEijk (obtained by employing density and speed of sound data) have been fitted to Redlich–Kister equation to determine ternary adjustable parameters along with their standard deviations. The VijkE and κSEijk results have been tested in terms of Graph and Prigogine–Flory–Patterson (PFP) theories. The results indicate that VijkE and κSEijk values calculated by Graph theory are comparable to the experimental values.

Graphical abstractDensities, ρijk for 1-ethyl-3-methylimidazolium tetrafluoroborate (i) + 1-methyl pyrrolidin-2-one (j) + cyclopentanone (k) mixture at T = (298.15, 293.15, 303.15 and 308.15) K.Figure optionsDownload full-size imageDownload as PowerPoint slide