Prediction of ultrasonic velocity and intermolecular free-length and their correlation with interaction in binary liquid mixtures

Densities, Excess Molar Volumes, Ultrasonic Speeds, and Isentropic Compressibilities of Hexan-1-ol with 1,2-Dichloroethane, 1,2-Dibromoethane, and 1,1,2,2-Tetrachloroethene at (293.15 and 298.15) K

“…The values of L f for all three binary mixtures obtained from the ultrasonic method are higher than the values computed from the thermodynamic and thermoacoustical methods [40] (Table 4). This trend has also been observed for the binary liquid mixtures of 1,1,2,2-tetrachloroethane with benzene, toluene, paraxylene, acetone, cyclohexane [40], and liquid methane with liquid tetrafluoromethane [41], and the other multicomponent liquid mixtures [42].…”

“…This trend has also been observed for the binary liquid mixtures of 1,1,2,2-tetrachloroethane with benzene, toluene, paraxylene, acetone, cyclohexane [40], and liquid methane with liquid tetrafluoromethane [41], and the other multicomponent liquid mixtures [42]. The thermodynamic method [42] has been found to be better than the ultrasonic method for calculating L f values provided T is not very close to T c because the right-hand side of Eq.…”

Studies on thermodynamic properties of binary mixtures of hexan-1-ol with halogenated compounds at T=(308.15 and 313.15)K

“…L fðTCEÞ > L fðDBEÞ > L fðDCEÞ ðTAPÞ: This trend has also been observed for the binary liquid mixtures of 1,1,2,2-tetrachloroethane with benzene, toluene, paraxylene, acetone, cyclohexane [25], and the other multicomponent liquid mixtures [24]. The variation of u through a mixture also depends on the increase or decrease in the values of L f and on temperature.…”

“…However, the thermoacoustic approach (TAP) predicts that the L f values in these binary mixtures decrease with the increase in the mole fraction of these halohydrocarbons. The L f values for these binary mixtures obtained from the ultrasonic methods are higher than those obtained from the free length theory [25] and the thermoacoustical approach. The L f values for the pure components vary in the order:…”

“…b 0 = 4b. The thermoacoustical method [24][25] has also been employed to obtain the available volume, V a using the relation…”