Temperature Dependence of Binary Mixing Properties for Acetone, Methanol, and Linear Aliphatic Alkanes (C₆−C₈)

Abstract

In this work we analyze the temperature dependence of the speed of sound, density, and refractive index of binary mixtures of acetone, methanol, and linear aliphatic alkanes (hexane, heptane, or octane) at atmospheric pressure. From the experimental measurements of these physical properties, the corresponding excess molar volumes, isentropic compressibility deviations, and refractive index deviations were derived. A set of variable-degree polynomials have been fitted to the results. Despite the large excess molar volumes obtained, they were satisfactorily correlated by a cubic equation of state with simple combinatorial mixing rules.

The development of unlike induced association-site models to study the phase behaviour of aqueous mixtures comprising acetone, alkanes and alkyl carboxylic acids with the SAFT-γ Mie group contribution methodology

“…Qualitative agreement for the excess volumes and quantitative agreement for the excess enthalpies are observed; these predictions serve to confirm the validity of the approach and of the parameters developed. Although not shown, we can confirm a similar level of agreement is found in comparison with the experimental data of Marino et al [130] for the mixture of acetone + n-hexane.…”

“…Furthermore, one of the strengths of the SAFT-γ Mie framework is that one is able to describe not only fluid-phase equilibrium but also other thermodynamic properties such as the excess properties of mixing. In Figure 6 the SAFT-γ Mie prediction of the excess enthalpy and excess volume for the mixture acetone + n-heptane are compared with available experimental data [129,130]. Qualitative agreement for the excess volumes and quantitative agreement for the excess enthalpies are observed; these predictions serve to confirm the validity of the approach and of the parameters developed.…”

Volumetric Properties of Binary Mixtures of 2,4,6-Trimethylpyridine with 1,2-Ethanediol, Methanol, and Water, and the Association Energies of the O–H· · ·N Bonded Complexes

“…The purity of the liquid samples is evidenced by the measured densities that are very close to literature data ( Table 1). The chemicals were stored in dark Methanol 786.549 786.37 [22], 786.4 [23], 786.49 [24], 786.5 [25,26], 786.6 [27], 786. 64 [28], 786.65 [29], 786.654 [30] 1,2-Ethanediol 1109.868 1109.6 [31], 1109.7 [32], 1109.87 [33], 1109.88 [34], 1109.90 [35], 1109.91 [36] glass flasks, the alcohols at room temperature, while 2,4,6-trimethylpyridine, which is chemically unstable, in a refrigerator.…”

Reply to the letter to the editor by E. Zorebski, S. Ernst about the paper “Densities, speeds of sound and isentropic compressibilities of the ternary mixture 2-propanol + acetone + cyclohexane and the constituent binary mixtures at 298.15 and 313.15K” [Fluid Phase Equilib. 215 (2004) 253–262]

“…In recent years, excess molar volume, V E , and excess isentropic compressibility, κ E s , [3][4][5] and excess molar volume, V E , and the changes of the isentropic compressibilities, ␦κ s , [6][7][8][9][10][11][12][13][14][15][16][17] have been interpreted in terms of strength of interaction between the molecules of the components of a given systems. As we have stated, we consider that other parameter must be calculated.…”