Excess volumes of the water/methanol, n-heptane/ethyl acetate, n-heptane/n-butyraldehyde, and n-heptane/isobutyraldehyde systems

Abstract

Excess volumes at 298.15 K have been measured by means of a vibrating tube densimeter for the binary mixtures of water with methanol, and n-heptane separately with ethyl acetate, n-butyraldehyde, and Isobutyraldehyde. Partial molar volumes have also been calculated.

Excess molar volumes and densities of (methanol+water) at temperatures between 323 K and 573 K and pressures of 7.0 MPa and 13.5 MPa

“…The densities of pure methanol were also determined in this work at the same temperatures and pressures as the measurements for {xCH 3 …”

“…Densities r and excess molar volumes V E m for this system are available at ambient conditions, (1)(2)(3) and some data at T Q 348 K and pressures up to 350 MPa have been reported. (4)(5)(6)(7) Other thermodynamic properties, such as excess molar heat capacity and excess molar enthalpy, are known only at temperatures near T = 298.15 K. (8)(9)(10) Pressure-dependent excess molar enthalpies of (methanol + water) have been reported by Simonson et al (11) at temperatures up to 573 K, from which V E m can be derived.…”

Temperature of maximum density and excess properties of short-chain alcohol aqueous solutions: A simplified model simulation study

“…Moreover, from a fundamental perspective the study of dilute short chain alcohol solutions is of utmost importance, being the simplest systems that illustrate the interplay of hydrogen bonding and hydrophobicity in amphiphilic substances. In particular, their thermodynamics is known to exhibit quite a few characteristic features, such as the presence of maxima in the excess specific heat [3,4], minima in the excess volume [3,5] and negative excess entropy [6]. Some of the anomalies found in these systems are in close connection with the more than seventy anomalies present in water, among them, the presence of a density maximum at 3.98 C and 1 bar in liquid water [7].…”

Excess molar volumes VmE, isothermal compressibilities k, and thermal expansivities α of {(1−x)H2O+xCH3OH} at T=(298.15 to 523.15) K and pressures up to 60 MPa

“…The previous experimental works [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18] on the excess molar volumes V E m , isothermal compressibilities k, and thermal expansivities a are tabulated in table 1. Many papers include a small range of state parameters.…”