This work presents new experimental data for density (ρ) and speed of sound (u), together with the corresponding excess properties, i.e., excess molar volume (VmE) and excess isentropic compressibility (κSE), for the ternary mixture butan-1-ol (1) + cyclohexane (2) + toluene (3) within the temperature interval of 293.15–333.15 K under an atmospheric pressure of 95.0 kPa. In addition, the binary subsystems butan-1-ol (1) + cyclohexane (2) and butan-1-ol (1) + toluene (3) were systematically examined across the full composition range. The excess molar volumes and excess isentropic compressibilities obtained from the experimental data were effectively represented through correlation models. Different correlations were used for modeling the physical properties of binary and ternary mixtures. To explore predictive strategies for complex fluid systems, the perturbed-chain statistical associating fluid theory (PC-SAFT) equation of state was implemented to estimate densities across binary and ternary mixtures. Complementarily, Schaaff’s collision factor theory (SCFT) and Nomoto’s relation (NR) were applied to model the speed of sound measurements. These analyses encompassed the ternary system composed of 1-butanol, cyclohexane, and toluene, as well as the binary mixtures of 1-butanol with toluene and with cyclohexane.
Zeqiraj et al. (Wed,) studied this question.