A Flow Calorimeter for Condensable Gases at Low Temperatures and High Pressures. 2. Compilation of Experimental Results and Comparison with Predictions Based on a Modified Redlich-Kwong Equation of State

1979 ◽  
Vol 18 (4) ◽  
pp. 339-345 ◽  
Author(s):  
Piet H. G. van Kasteren ◽  
Hans Zeldenrust
Keyword(s):  
Equation Of State ◽  
Low Temperatures ◽  
High Pressures ◽  
Experimental Results ◽  
Flow Calorimeter

Thick, Multistepped Iron and Tantalum Targets for Equation-of-State Measurements at High Pressures and Low Temperatures

2011 ◽  
Vol 59 (1) ◽  
pp. 133-138 ◽  
Author(s):  
P. B. Mirkarimi ◽  
K. A. Bettencourt ◽  
M. C. Kellam ◽  
P. J. Davis ◽  
N. E. Teslich ◽  
...  
Keyword(s):  
Equation Of State ◽  
Low Temperatures ◽  
High Pressures

Equation of state of liquid o-xylene at low temperatures and high pressures

1994 ◽  
Vol 90 (23) ◽  
pp. 3527-3532 ◽  
Author(s):  
Mercedes Taravillo ◽  
Susana Castro ◽  
Valentín García Baonza ◽  
Mercedes Cáceres ◽  
Javier Núñez
Keyword(s):  
Equation Of State ◽  
Low Temperatures ◽  
High Pressures

Densities of Amorphous Polymers at High Pressures

1976 ◽  
Vol 49 (2) ◽  
pp. 207-209
Author(s):  
S. Beret ◽  
J. M. Prausnitz
Keyword(s):  
Experimental Data ◽  
High Pressure ◽  
Equation Of State ◽  
Rational Design ◽  
High Pressures ◽  
Amorphous Polymers ◽  
Low Pressure ◽  
Experimental Results ◽  
Tait Equation ◽  
Simple Method

Abstract Experimentally determined densities and compressibilities of amorphous polymers are frequently available; but, because of experimental difficulties, few experimental results have been reported at high pressures. Such densities, however, are sometimes required for rational design of extrusion and similar processes. We report here a simple method for estimating densities and compressibilities at high pressures from experimental compressibilities at low pressure. Our method is based on a relation for liquids suggested by Wada and developed by Chueh and Prausnitz. The purpose of this note is to suggest a method for estimating polymer densities at high pressure wherever experimental data are insufficient for obtaining parameters needed in an equation of state, as, for example, the Tait equation.

The statistical thermodynamics of solutions of non-spherical molecules. I. The thermodynamic functions

1955 ◽  
Vol 229 (1177) ◽  
pp. 271-280 ◽  
Keyword(s):  
Carbon Tetrachloride ◽  
Equation Of State ◽  
Thermodynamic Functions ◽  
Statistical Thermodynamics ◽  
Intermolecular Forces ◽  
Pure Component ◽  
Experimental Results ◽  
Thermodynamics Of Solutions ◽  
Theory And Experiment

The perturbation treatment of the orientational forces between non-spherical molecules proposed by Cook & Rowlinson (1953) is extended to mixtures by using the theory of solutions put forward by Longuet-Higgins (1951). The thermodynamic functions and the equation of state of such mixtures are expressed in terms of the intermolecular forces and the properties of one pure component. Expressions are derived for the excess (or non-ideal) thermodynamic functions which are compared with the experimental results on the four solutions, benzene+ cyclohexane , benzene+carbon tetrachloride, benzene + ethylene dychloride, and cyclohexane + carbon tetrachloride. The agreement between theory and experiment is improved by taking account of the orientational forces.

Pneumatic Mechanism of Gas Cooled or Heated Through a Throttle Orifice

2011 ◽  
Vol 141 ◽  
pp. 408-412 ◽  
Author(s):  
Yao Bao Yin ◽  
Ling Li
Keyword(s):  
Equation Of State ◽  
Total Energy ◽  
Negative Energy ◽  
Experimental Results ◽  
Attractive Force ◽  
Positive Energy ◽  
Real Gas ◽  
Thomson Coefficient ◽  
Theoretical Results ◽  
Conversion Temperature

The mechanism of gas cooled or heated through a pneumatic throttle orifice is analyzed. Supposing the total energy of the gas is constant, if the force between the molecules does positive energy, it makes gas heated; if it does negative energy, it makes gas cooled. The conversion temperature of gas is an evaluation parameter for repulsive or attractive force. It has utilized Joule-Thomson coefficient and real gas equation of state to obtain the characteristics of conversion temperature, and the relationships between the molecules distance and the phenomenon of gas cooled or heated after throttle at normal temperature by the conversion characteristics are achieved. The experimental results agreed well with the theoretical results.

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