Results 191 to 200 of about 3,568,782 (253)

Virial coefficients from equation of state

Journal of Molecular Liquids, 2003
Abstract This paper presents the theoretical prediction of second, third and fourth virial coefficients of linear hard chain molecules employing equations of state. The equations of state are determined through statistical associating fluid theory (SAFT).
Vivek Kumar Singh, K.N. Khanna
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Virial equation of state of nonpolar gases

Journal of engineering physics, 1984
An equation of state is studied in which the second and third virial coefficients are calculated theoretically and an empirical expression is used for the fourth virial coefficient. It is shown that this equation of state describes the experimental data on the compressibility of nonpolar gases for T ⩾ 0.7TB and ρ⩽ 0.8pcr.
N. A. Zykov, R. M. Sevast'yanov, R. A. Chernyavskaya   +2 more
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Virial equation of state of helium, xenon, and helium-xenon mixtures from speed-of-sound and burnettPρT measurements

International Journal of Thermophysics, 1997
J J Hurly, M R Moldover, Moldover M R
exaly   +2 more sources

Truncation errors associated with the virial equation

Fluid Phase Equilibria, 1977
Abstract The virial equation is useful and frequently applied because of its precise foundation in statistical mechanics. Unfortunately, the equation is an infinite series which requires truncation for practical applications. This paper contains generalized plots suggesting optimal truncation of the virial equation and other generalized plots which ...
Sum-Muk Lee, Philip T. Eubank, Kenneth R. Hall   +2 more
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A generalized quantum virial equation

Journal of Physics A: Mathematical and General, 1977
A method, similar to the one previously used by the author in his derivation of a generalized classical virial theorem (see ibid., vol.10, no.4, p.507 (1977)), is used to derive a generalized quantum virial equation. This equation is applicable to any part of a larger system of particles.
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Exponential Virial Equation of State

The Journal of Chemical Physics, 1968
An equation of state is derived which has promise for the prediction of high-density fluid behavior. An approximate form of this new equation yields expressions for approximate virial coefficients of all orders as functions of lower-order exact virial coefficients.
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Virial equation of state for rigid spherocylinders

Molecular Physics, 1978
Third, fourth and fifth virial coefficients are reported for isotropic systems of hard prolate spherocylinders with length to breadth ratios of up to 6:1. The results are compared with other recent data for such molecules and with the predictions of an analytical equation of state for convex hard molecules. The variation with shape of the fourth virial
Peter A. Monson, Maurice Rigby
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3 The virial equation of state

2000
J. Trusler
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The Bender Equation of State and Virial Coefficients

Collection of Czechoslovak Chemical Communications, 2000
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
Anatol Malijevský, Tomáš Hujo
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WKB for coupled equations and virial coefficientsa)

The Journal of Chemical Physics, 1982
Using semiclassical expressions for eigenphase shifts and bound state energies arising from WKB approximations to the solutions of coupled equations, we show that quantum mechanical formulas for the third virial coefficient (restricted to positive potentials) and for the second virial cofficient (with anisotropic interactions) lead to the known ...
Sigurd Yves Larsen, Alejandro Palma, Manuel Berrondo   +2 more
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