Applications of the Augmented van der Waals Theory of Fluids.: I. Pure Fluids

Wiley - Tập 81 Số 10 - Trang 1048-1052 - 1977
Stephen S. Chen1, Aleksander Kreglewski1
1Thermodynamics Research Center, Department of Chemistry, Texas A & M University, College Station, Texas 77843

Tóm tắt

AbstractThe relation for the compressibility of hard convex bodies (Boublik, 1975) is combined with the power series in (u/k T) and (V°/V) (Alder et al., 1972) to obtain the most general and accurate equation of state of fluids. 24 universal constants of the series were fitted to the internal energy and PVT data for argon. The equation also contains 5 characteristic constants that were fitted to the properties of 11 fluids to show its validity at all densities ranging from zero (second virial coefficients) to the liquid density at T/Tc = 0.55 that corresponds to the triple point of argon. The interaction energy u/k appears to be equal to the critical temperature Tc for small molecules but it becomes a function of the temperature for non‐spherical molecules, in agreement with the theory of non‐central forces.

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Tài liệu tham khảo

10.1063/1.1677637

10.1063/1.431882

10.1063/1.1672048

10.1080/00268976900100811

10.1002/aic.690210612

10.1063/1.1712308

10.1021/je60059a004

A.KreglewskiandS. S.Chen A simple equation of state for fluids unpublished report Thermodynamics Research Center1975.

10.1021/j100612a020

10.1021/j100572a011

Intern. Thermodynamic Tables of the Fluid State (IUPAC), 1972, Argon 1971

10.1007/BF00578417

Clifford A. A., 1953, Faraday Trans. I, 1975

Whalleyand E., 1954, Trans. AIME, 76, 1001

10.1039/tf9676301320

Our choice ofu/k=Tccompared to Alder's result thatu/k=Tc/1.260 (for 500 particles) affects only the numerical values of the constantsDnmbut not their sign.

1958, The basic relations for residual functions are given by J. S. Rowlinson in vol. 12 of Handbuch der Physik

10.1063/1.1680836

10.1021/j150581a037

10.1021/ie50481a037

10.1021/ie50517a065

G. A.ChapelaandJ. S.Rowlinson J. chem. Soc. Faraday Trans. I.1974. 584.

10.1021/j100844a035

Dymond J. H., 1969, The Virial Coefficients of Gases

10.1021/je60039a007

Din F., 1961, Thermodynamic Functions of Gases

10.1021/je60010a013

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Wiley

Tập 81 Số 10

1048-1052

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