Excess Enthalpy, Excess Volume, and Speed of Sound Deviation for the Mixtures β-Pinene + Ethanol and β-Pinene + 1-Propanol at (283.15, 298.15, and 313.15) K

Abstract

Excess enthalpies, densities, and speeds of sound at temperatures of (283.15, 298.15, and 313.15) K are reported for binary mixtures of β-pinene + ethanol and β-pinene + 1-propanol. Excess molar volumes have been calculated from the densities. The deviations in the speeds of sound have also been estimated. All of the properties have been fitted to Padé approximants. Excess molar enthalpies and excess molar volumes are positive for both mixtures, whereas the speed of sound deviations show negative values. The values of these properties are discussed in terms of the molecular interactions. The enthalpic and volumetric behaviors of the mixtures are compared with those of the mixtures of ethanol or 1-propanol with cyclohexane or methylcyclohexane, which are two simple hydrocarbons whose basic ring is similar to that of β-pinene.

Densities, viscosities, and ultrasonic velocity studies of binary mixtures of trichloromethane with methanol, ethanol, propan-1-ol, and butan-1-ol at T=(298.15 and 308.15)K

“…It is seen that the L E f values are negative for CHCl 3 + CH 3 OH indicating contraction, but Dj s values are positive. It is stressed [21] that the intermolecular free length cannot be the sole cause, and that other contributions too play an important role in the deviations. There are many reports in the literature [22][23][24][25][26] where V E and Dj s do not follow the same trend.…”

Thermophysical properties of the binary mixtures (1,8-cineole+1-alkanol) at T=(298.15 and 313.15)K and at atmospheric pressure

“…The molar excess enthalpies were determined with a Thermometrics 2277 Thermal Activity Monitor maintained at ±0.002 K [6] and operating under constant flow conditions [47,50,51]. Two Shimadzu LC-10ADVP HPLC pumps were used to drive the liquids.…”

Thermophysical properties of {(±)-linalool+propan-1-ol}: A first stage towards the development of a green process

“…Thus, the selection of adequate methods to reproduce the phase behavior, specially, in the liquid region, is the first stage to the development of a green process. In this way, the experimental information on the high pressure densities of liquid mixtures, involving a co-solvent and a solute of interest [3], is a valuable tool to test the more appropriate model. As, the direct study of (normal extracts + alkanols) mixtures is difficult to carry out, it can be more effective to study mixtures of the major compounds in essential oils with the mentioned alkanols.…”