A generalized equation for computer calculation of liquid densities

Yen, Lewis Chinsun; Woods, Steven G.

doi:10.1002/aic.690120119

Cited by 236 publications

(122 citation statements)

References 11 publications

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“…As all of the studied dicarboxylic acids, pure adipic acid is solid at room temperature, but the subcooled liquid density can be calculated with Yen-Woods method (Yen and Woods, 1966). The pure liquid adipic acid density dependence on temperature was then estimated as:…”

Section: Malonic and Adipic Acidsmentioning

confidence: 99%

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Homogeneous vs. heterogeneous nucleation in water-dicarboxylic acid systems

et al. 2009

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Abstract.Binary heterogeneous nucleation of watersuccinic/glutaric/malonic/adipic acid on nanometer-sized particles is investigated within the frame of classical heterogeneous nucleation theory. Homogeneous nucleation is also included for comparison. It is found that the nucleation probabilities depend on the contact angle and on the size of the seed particles. New thermodynamical properties, such as saturation vapor pressure, density and surface tension for all the dicarboxylic acid aqueous solutions are included in the calculations. While the new surface tension and density formulations do not bring any significant difference in the computed nucleation rate for homogeneous nucleation for succinic and glutaric acids, the use of the newly derived equations for the vapor pressure decrease the acid concentrations in gas phase by 3 orders of magnitude. According to our calculations, the binary heterogeneous nucleation of succinic acid-water and glutaric acid-water -although it requires a 3-4 orders of magnitude lower vapor concentrations than the homogeneous nucleation -cannot take place under atmospheric conditions. On the other hand binary homogeneous nucleation of adipic acid-water systems might be possible under conditions occuring in upper boundary layer. However, a more detailed characterization of the interaction between the surface and the molecules of the nucleating vapor should be considered in the future.

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Section: Malonic and Adipic Acidsmentioning

confidence: 99%

“…The pure subcooled liquid density for malonic acid is obtained using the Yen-Woods method (Yen and Woods, 1966) and its temperature dependence reads:…”

Section: Malonic and Adipic Acidsmentioning

confidence: 99%

Homogeneous vs. heterogeneous nucleation in water-dicarboxylic acid systems

et al. 2009

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“…The ideality assumption is reasonable because succinic acid is a weak acid and thus not readily dissociate, and because the succinic acid is expected to behave ideally due to the low concentrations characteristic to this study Varga et al, 2007). Density of pure succinic acid was estimated using the Yen-Woods method (Yen and Woods, 1966) by Hyvärinen et al (2006) ( Table 1). The density of the ternary solution can be estimated by taking the mass weighted average of the binary densities:…”

Section: Density Of the Ternary Solutionmentioning

confidence: 99%

Ternary solution of sodium chloride, succinic acid and water; surface tension and its influence on cloud droplet activation

et al. 2008

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Abstract. Surface tension of ternary solution of sodium chloride, succinic acid and water was measured as a function of both composition and temperature by using the capillary rise technique. Both sodium chloride and succinic acid are found in atmospheric aerosols, the former being main constituent of marine aerosol. Succinic acid was found to decrease the surface tension of water already at very low concentrations. Sodium chloride increased the surface tension linearly as a function of the concentration. Surface tensions of both binary solutions agreed well with the previous measurements. Succinic acid was found to lower the surface tension even if sodium chloride is present, indicating that succinic acid, as a surface active compound, tends to concentrate to the surface. An equation based on thermodynamical relations was fitted to the data and extrapolated to the whole concentration range by using estimated surface tensions for pure compounds. As a result, we obtained an estimate of surface tensions beyond solubility limits in addition to a fit to the experimental data. The parameterization can safely be used at temperatures from 10 to 30 • C. These kinds of parameterizations are important for example in atmospheric nucleation models. To investigate the influence of surface tension on cloud droplet activation, the surface tension parameterization was included in an adiabatic air parcel model. Usually in cloud models the surface tension of pure water is used. Simulations were done for characteristic marine aerosol size distributions consisting of the considered ternary mixture. We found that by using the surface tension of pure water, the amount of activated particles is underestimated up to 8% if particles contain succinic acid and overestimated it up to 8% if particles contain only sodium chloride. The surface tension effect was found to increase with increasing updraft velocity.

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“…The liquid molar volumes of the pure compounds were estimated by the equation of Yen and Woods (1966).…”

Section: Results and Treatmentmentioning

confidence: 99%

Vapor-liquid equilibrium measurements for the binary system methyl acetate+ethanol at 0.3 and 0.7 MPa

Badajoz

Rios-Santana

Sosa-Rosario

2011

Braz. J. Chem. Eng.

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-This paper reports experimental data of the isobaric vapor-liquid equilibria (VLE) for the mixture methyl acetate + ethanol at 0.3 and 0.7 MPa, determined using a copper still ebulliometer. The activity coefficients obtained from the experimental data were correlated by using different thermodynamic mathematical models. All the binary systems show a positive consistency when subjected to the point-to-point test of Van Ness. The prediction of VLE data obtained with the UNIFAC and ASOG methods has been verified with experimental data.

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A generalized equation for computer calculation of liquid densities

Abstract: = constant = surface tension, dynes/cm. = separation of variabies parameter, only a function = time, sec.

Cited by 236 publications

References 11 publications

Homogeneous vs. heterogeneous nucleation in water-dicarboxylic acid systems

Homogeneous vs. heterogeneous nucleation in water-dicarboxylic acid systems

Ternary solution of sodium chloride, succinic acid and water; surface tension and its influence on cloud droplet activation

Vapor-liquid equilibrium measurements for the binary system methyl acetate+ethanol at 0.3 and 0.7 MPa

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