Corresponding states for the viscosity of noble gases up to high densities

Trappeniers, N.J.; Botzen, A.; Seldam, C.A. Ten; Berg, H. van den; Oosten, J. Van

doi:10.1016/0031-8914(65)90136-9

Cited by 27 publications

(1 citation statement)

References 25 publications

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“…1 shows values of b o calculated from experimental values of the transport coefficients at constant temperature for neon,3 argon,4-6 krypton/' s and xenon. 9 The dotted curve B shows the temperature dependence of b o that is predicted by equating the average kinetic energy of two molecules to their Lennard-Jones 6-12 potential energy at a separation distance d: (3) where The diffusion of normal alkanes in solution has been studied experimentally by a number of authors. 1 -4 Perhaps the main reason for the interest in these systems is that they can be looked on as prototypes, or model systems, for the study of the hydrodynamic interaction between parts of the same molecule which is so important for polymer solutions.…”

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confidence: 99%

Calculations of the Diffusion Coefficients of n-Alkanes

Paul

Mazo

1968

The Journal of Chemical Physics

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mentioning

confidence: 99%

Calculations of the Diffusion Coefficients of n-Alkanes

Paul

Mazo

1968

The Journal of Chemical Physics

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Equilibrium, thermodynamic, and transport properties of polyatomic gases from molecular structure

Galloway¹

1972

AIChE Journal

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The possibility of predicting physical properties for polyatomic gases entirely from molecular structure has been explored. Intramolecular force constants for the bonds can be drawn from spectroscopically established tables and applied successfully to molecules involving a large variety of structures. A vibrational analysis of the molecule using these constants yields the thermodynamic functions of the ideal gas. The intermolecular pair potential parameters for the spherical core model of Kihara can be obtained quantitatively from molecular constants, and this potential can be used in obtaining the dilute gas transport properties. A linear relationship was found between the Kihara spherical core size and Pitzer's acentric factor. Also from the Kihara model the critical constants are derived, which allows one to use Pitzer's compressibility tables for the dense gas corrections to the ideal gas law and the excess functions of the thermodynamic quantities. A complete package of computer programs which predict all important physical properties directly from input name alone has been written and tested. Suggestions are given for future work needed to improve many of the techniques presented. T. R, GALLOWAY University of California Sanitary Engineering Research LaboratoryRichmond, California 94804 SCOPEThe present scheme was developed to determine just how far our current knowledge could take us toward achieving this goal of a priori properties prediction from molecular structure. We sought to strike a balance between computer information retrieval from a large data base and properties prediction. Automated computer methods for properties are an important part of all process design engineering computer systems used in industry, and there is a great economic incentive to reduce the associated storage and computation costs for properties. For the past decade nearly all proprietary systems were based on the AIChE Physical Properties Estimation System (APPES) developed for IBM 7094 equipment which has proved to be a very expensive operation. Molecular structure information for a variety of molecules has become available in just enough detail to encourage development of new predictive methods for the physical properties. The kind of structural information needed is minimal, such as an accurate scale molecular model. This concept is directed toward future computer applications, when a user can enter the structural information at a remote console in a familiar language and select the type of properties desired and conditions of temperature, pressure, composition, etc. Even with no experimental data available to the user, predictions of physical properties may be possible. CONCLUSIONS AND SIGNIFICANCEThe thermophysical properties for many species important in chemical engineering now can be computed with engineering accuracy given a cipher with only molecular structure information. The properties of rigid, spherically symmetric molecules are quite adequate, whereas those for aspheric, flexible species involving complex energy ...

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Elektrische Leitfähigkeit wäßriger Lösungen bei hohen Temperaturen und Drucken. III [2, 3]. Kaliumchlorid in überkritischen Wasser‐Argon‐Mischungen

Hartmann

Franck

1969

Ber Bunsenges Phys Chem

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Bei 440 °C wurden in komprimierten, überkritischen, homogenen Wasser‐Argon‐Mischungen geringe Mengen Kalium‐chlorid [10−‐4 bis 10−‐2 (mol(KCl)/l) bei 25 °C und 1 bar] aufgelöst und die elektrolytische Leitfähigkeit bis zu Drucken von 3,8 kbar gemessen. Bei konstanter Teilchenzahldichte wurden bis zu 40 Mol‐% des Wassers durch inertes Argon ersetzt. Dadurch konnte die Dielektrizitätskonstante ϵ des Lösungsmittels zwischen 20 und 4 stetig variiert werden. Die Gleichgewichtskonstanten KA für die Assoziation der Kalium‐ und Chlorionen zu Ionenpaaren als Funktion von ϵ und T wurden berechnet. Die KA‐Werte wurden verglichen mit dem von Lind und Fuoss [27] untersuchten Verhalten von KCl in flüssigen Wasser‐Dioxan‐Mischungen bei 25 °C.

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Corresponding states for the viscosity of noble gases up to high densities

Cited by 27 publications

References 25 publications

Calculations of the Diffusion Coefficients of n-Alkanes

Calculations of the Diffusion Coefficients of n-Alkanes

Equilibrium, thermodynamic, and transport properties of polyatomic gases from molecular structure

Elektrische Leitfähigkeit wäßriger Lösungen bei hohen Temperaturen und Drucken. III [2, 3]. Kaliumchlorid in überkritischen Wasser‐Argon‐Mischungen

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