Acoustic, Thermodynamic, Viscometric and Volumetric Studies in Multicomponent System of Hexane + 1-Dodecanol + Cyclohexane with Respect to Temperature

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The observed experimental values of sound speed, mass density and viscosity at three different temperatures viz. 298, 308 and 318K have been used to compute the derived parameters. As excess parameters are better measures of intermolecular interactions these are calculated with the help of derived parameters. Excess parameters calculated are excess molar volume (V m E), excess molar free volume (V mf E), excess intermolecular free length (L f E), deviation in isentropic compressibility (ΔKs), deviation in viscosity (Δη), excess acoustic impedance (Z E) deviation in sound speed (Δu), and excess internal pressure (π i E), excess enthalpy (H E) and excess Gibb´s free energy of activation of viscous flow (G *E). The sign and magnitude of these excess parameters provide the detail information about the type and extent of intermolecular interactions over the entire composition and temperature range. These excess parameters are fitted to Redlich–Kister polynomial equation to get information about the standard deviation of each excess parameter from ideal behavior after mixing the components. The sound speed in ternary mixtures has been predicted using various empirical, semi empirical and statistical theories. These theories include Nomoto´s Relation (u NOM), Free Length Theory (u FLT), Impedance Dependence Relation (u IDR) and Vandeal Vangeel Ideal mixing relation (u VAN). These theories have been applied to investigate the best applicability of these for the system over entire composition range at three temperatures.