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.

Parameters of the Bender Equation of State for Chloro Derivatives of Methane and Chlorobenzene

2001 ◽  
Vol 66 (6) ◽  
pp. 833-854 ◽  
Author(s):  
Ivan Cibulka ◽  
Lubomír Hnědkovský ◽  
Květoslav Růžička
Keyword(s):  
Experimental Data ◽  
Equation Of State ◽  
Virial Coefficient ◽  
Second Virial Coefficient ◽  
Virial Coefficients ◽  
Liquid Equilibrium ◽  
Second Virial Coefficients ◽  
Equilibrium Data ◽  
State Behaviour ◽  
Derivatives Of

Values of adjustable parameters of the Bender equation of state evaluated for chloromethane, dichloromethane, trichloromethane, tetrachloromethane, and chlorobenzene from published experimental data are presented. Experimental data employed in the evaluation included the data on state behaviour (p-ρ-T) of fluid phases, vapour-liquid equilibrium data (saturated vapour pressures and orthobaric densities), second virial coefficients, and the coordinates of the gas-liquid critical point. The description of second virial coefficient by the equation of state is examined.

Intermolecular forces and properties of fluids II. A general functional representation of inter molecular potentials, and some values of the second, third and fourth virial coefficients for systematically differing potentials

1960 ◽  
Vol 254 (1279) ◽  
pp. 499-506 ◽  
Keyword(s):  
Experimental Data ◽  
Complete System ◽  
Virial Coefficients ◽  
Intermolecular Forces ◽  
Potential Well ◽  
Intermolecular Potentials ◽  
Lennard Jones ◽  
Functional Representation ◽  
Single Term ◽  
Molecular Potentials

A new functional representation of angle-independent intermolecular potentials is described, having an unlimited number of parameters in the form of linear coefficients in an expansion depending on a complete system of functions. The basic single-term form of th is function is practically equivalent to the Lennard-Jones (6-12) potential. Three particular examples of this potential, having different widths of the potential well, have been examined, and the second, third, and fourth virial coefficients for them have been calculated for a number of temperatures. It is shown that the new functional representation should enable better and more systematic progress in the estimation of intermolecular potentials to fit experimental data.

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