Variation of Densities, Refractive Indices, and Speeds of Sound with Temperature of Methanol or Ethanol with Hexane, Heptane, and Octane

Abstract

In this work we present experimental values of the density, refractive index, and speed of sound of the binary mixtures methanol or ethanol plus hexane, heptane, and octane at the temperatures 303.15, 308.15, 313.15, and 318.15 K and at atmospheric pressure, as a function of mole fraction. The experimental results have been fitted as a funtion of composition. A comparison with other experimental data in the literature has been made.

Mixing properties of binary mixtures presenting azeotropes at several temperatures

“…Excess molar volumes for the binary mixtures (ethanol + hexane or heptane or 2-butanone) and (2-propanol + 2-butanone or ethylacetate or cyclohexane) and the fitted curves from T = (293.15 to 303.15) K versus the mole fraction are shown in figure 1. The comparison with literature [4][5][6][7][8][9][10][11][12] data is enclosed and the results agree with the experimental data.…”

“…The standard deviations between experimental and calculated values are enclosed. A comparison with the literature data [4][5][6][7][8][9][10][11][12][13][14] was made and the results are shown graphically.…”

Isobaric vapor–liquid equilibria for mixtures of acetone, ethanol, and 2,2,4-trimethylpentane at 101.3kPa

“…The corresponding azeotropic temperatures were computed from the experimental results around the azeotropic point, using the x 1 values previously determined. The azeotropic temperatures at 101.3 kPa are 328.67 K with x 1 = 0.912 for acetone (1) + 2,2,4-trimethylpentane (2), and 344.43 K (344.42 K) with x 1 = 0.648 (0.645) for ethanol (1) + 2,2,4-trimethylpentane (2). The azeotropic values in the parentheses were obtained from Hiaki et al [10].…”

“…Thus, it is important to investigate the possible use of other oxygenates to comply with environmental regulations. Because of this, there has been an increasing interest in the thermodynamic behavior of liquid mixtures of oxygenated compounds in a hydrocarbon mixture [1][2][3][4][5][6]. Especially, vapor-liquid equilibrium data are important for predicting the vapor phase composition that would be in equilibrium with different hydrocarbon liquids.…”

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.…”