Thermodynamics Research Center / ThermoML | Thermochimica Acta

ABSTRACT

Densities (n) of pure liquids and their mixtures have been measured over the entire composition range for the binary mixtures of benzylalcohol with 1-heptanol, 1-octanol, 1-nonanol and 1-decanol at 298.15 K to 313.15 K and at atmospheric pressure by using Rudolph Research Analytical Digital Density Meter (DDM-2911 model). Further, the speed of sound velocities for the above said mixtures were also measured at 303.15 K and 313.15 K. The experimental density data were used to compute excess molar volumes (VE) and it is compared with predictive expression proposed by Redlich-Kister and Hwang equation. Excess speed of sound (uE), isentropic compressibility (eS) and excess isentropic compressibilities (eSE) were evaluated from experimental sound velocity and density data. Moreover, the experimental speed of sound were compared in terms of theoretical models proposed by Schaaff's collision factor theory (CFT) and Jacobson's free length theory (FLT). The experimental results were discussed in terms of intermolecular interactions between component molecules.