Thermodynamics of haloarenes with n-hexane at 298.15-318.15 K: Density, ultrasonic speed and viscosity

Densities (rho), ultrasonic speeds (u) and dynamic viscosity (eta) of the binary 2-chlorotoluene or 4-chlorotoluene or 1,3-dichlorobenzene (1) + n-hexane (2) mixtures were measured at (T = 298.15-318.15) K and atmospheric pressure. Using these measurements, excess volume (V-m(E)), excess ultrasonic speed (u(E)) and deviation in dynamic viscosity (Delta eta) were calculated. Excess isentropic compressibility (kappa(E)(s)) was calculated using rho and u values. The VmE values have been interpreted by Prigogine-Flory-Patterson (PFP) theory. The VmEobtained using PFP theory agree well with experimental values. The u values were also calculated using various empirical relations. The available volume (V-a) and intermolecular free length (L-f) were calculated using experimental u values employing Jacobson free length theory. The Delta eta values were coupled with V-m(E) values to understand intermolecular interaction. Further, Bloomfield and Dewan model was applied to calculate eta and Delta eta values of the studied binary mixture and calculated values agree well with experimental values. (C) 2020 Elsevier B.V. All rights reserved.

Automated summary

The study measured the physical properties of binary mixtures of 2-chlorotoluene, 4-chlorotoluene, or 1,3-dichlorobenzene with n-hexane, such as density, ultrasonic speed, and dynamic viscosity. Various calculations and models were used to analyze the intermolecular interactions and properties of the mixtures.