Volumes of aqueous alcohols, ethers, and ketones to T = 523 K and p = 28 MPa

Densities of dilute aqueous solutions of isopropanol, 1,5-pentanediol, cyclohexanol, benzyl alcohol, diethyl ether, 1,2-dimethoxyethane, acetone, and 2,5-hexanedione were measured by means of a vibrating-tube flow densimeter at temperatures near T = (302, 373, 423, 473, and 521) K at a pressure of p...

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Bibliographic Details
Published in:The Journal of chemical thermodynamics 1999-09, Vol.31 (9), p.1195-1229
Main Authors: SCHULTE, M. D, SHOCK, E. L, OBSIL, M, MAJER, V
Format: Article
Language:English
Subjects:
2-Propanol - chemistry
Acetone - chemistry
Alcohols - chemistry
Atmospheric Pressure
Benzyl Alcohol - chemistry
Chemical thermodynamics
Chemistry
Cyclohexanols - chemistry
Ether - chemistry
Ethers - chemistry
Ethyl Ethers - chemistry
Exact sciences and technology
General and physical chemistry
Glycols - chemistry
Hexanones - chemistry
Ketones - chemistry
Mixtures
Pentanes
Solutions - chemistry
Temperature
Thermodynamic properties
Thermodynamics
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Summary:Densities of dilute aqueous solutions of isopropanol, 1,5-pentanediol, cyclohexanol, benzyl alcohol, diethyl ether, 1,2-dimethoxyethane, acetone, and 2,5-hexanedione were measured by means of a vibrating-tube flow densimeter at temperatures near T = (302, 373, 423, 473, and 521) K at a pressure of p = 28 MPa. At the lowest and highest temperatures, measurements were also made close to the saturation vapour pressure of water to investigate the effect of pressure on the volumes of solutes. Apparent molar volumes were calculated for each solute and extrapolated to give partial molar volumes at infinite dilution. The variation of the volume with temperature, pressure, and structure of solute is discussed qualitatively, and group contributions are determined at the temperatures of measurements and p = 28 MPa. Several equations proposed in the literature for correlating the partial molar volumes at infinite dilution as a function of state parameters are tested. Parameters of one selected equation are tabulated allowing calculation of the partial molar volumes at infinite dilution at temperatures and pressures up to T = 573 K and p = 40 MPa. respectively.
ISSN:0021-9614
1096-3626
DOI:10.1006/jcht.1999.0533