First quantum corrections to second virial coefficients for anisotropic interactions: Simple, corrected formulaa)

1983 ◽  
Vol 78 (12) ◽  
pp. 7217-7222 ◽  
Author(s):  
Russell T Pack
Keyword(s):  
Virial Coefficients ◽  
Quantum Corrections ◽  
Second Virial Coefficients ◽  
Anisotropic Interactions

Predictions of adiabatic Joule–Thomson coefficients based on modern potentials for noble gases

1976 ◽  
Vol 54 (16) ◽  
pp. 2617-2627 ◽  
Author(s):  
Vijay P. S. Nain ◽  
Ronald A. Aziz
Keyword(s):  
Experimental Data ◽  
Virial Coefficients ◽  
Inert Gases ◽  
Quantum Corrections ◽  
Intermolecular Potentials ◽  
Second Virial Coefficients ◽  
Empirical Relations ◽  
Pressure Region ◽  
Thomson Coefficient ◽  
Realistic Potentials

The predictions of the Joule–Thomson coefficient for the inert gases on the basis of numerous intermolecular potentials are calculated and compared with directly measured experimental data and derived values from p–V–T measurements. For all Systems, the agreement is good except for TFD potentials derived by Gustafsson for He and Ne. We have also shown that the kinetic energy corrections in the low pressure region are not as high as those suggested by Gustafsson. Inversion temperatures are also calculated and recommended values are presented. Also presented are empirical relations which give as a function of temperature, second virial coefficients including the first two quantum corrections for many of the realistic potentials.

Contributions of Nonspherical Interactions to the Second Virial Coefficients of H2 and HD Gases

1971 ◽  
Vol 49 (20) ◽  
pp. 2547-2551 ◽  
Author(s):  
Asit B. Rakshit ◽  
Sucheta Chowdhury
Keyword(s):  
Virial Coefficient ◽  
Second Virial Coefficient ◽  
Virial Coefficients ◽  
Quantum Effects ◽  
Quantum Corrections ◽  
Second Virial Coefficients

The second virial coefficient B(T) of H2 and HD gases, including the quantum corrections, have been evaluated by considering spherical as well as the different nonspherical interactions arising mainly from the permanent and induced electric moments of the molecules. The calculations are valid at intermediate temperatures where the quantum effects are comparatively small. For H2 the present results have been compared with the earlier ones of Wang Chang.

The Bender Equation of State and Virial Coefficients

2000 ◽  
Vol 65 (9) ◽  
pp. 1464-1470 ◽  
Author(s):  
Anatol Malijevský ◽  
Tomáš Hujo
Keyword(s):  
Equation Of State ◽  
Virial Coefficient ◽  
Virial Coefficients ◽  
Low Density ◽  
Second Virial Coefficients ◽  
The Third ◽  
Temperature Dependences ◽  
Experimental Values

The second and third virial coefficients calculated from the Bender equation of state (BEOS) are tested against experimental virial coefficient data. It is shown that the temperature dependences of the second and third virial coefficients as predicted by the BEOS are sufficiently accurate. We conclude that experimental second virial coefficients should be used to determine independently five of twenty constants of the Bender equation. This would improve the performance of the equation in a region of low-density gas, and also suppress correlations among the BEOS constants, which is even more important. The third virial coefficients cannot be used for the same purpose because of large uncertainties in their experimental values.

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