The bender equation of state for describing thermodynamic properties of krypton, neon, fluorine, sulfur dioxide and water over a wide range of state

AbstractThis article summarizes the correlation procedures developed for IUPAC Project 2012-040-1-100 [Reference correlations for the thermal conductivity and viscosity of fluids over extended range of conditions (vapor, liquid and supercritical regions)]. This project is focused on the development of wide-range reference correlations for the thermal conductivity and viscosity of fluids that incorporate as much theoretical knowledge of these properties as possible. The thermal conductivity and viscosity correlations developed here for pure fluids are functions of temperature and density. The best available equations of state for a given fluid are used to calculate the thermodynamic properties required for these correlations, often from measured temperatures and pressures. The correlation methodology developed during this project has been applied to hexane in this report but can be applied to any pure fluid with a reliable equation of state and reliable data for the thermal conductivity and viscosity over a significant range of temperatures and densities.

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Analytic equation of state and thermodynamic properties for He–H2 fluid mixtures over a wide range of pressures and temperatures

Chemical Physics ◽

10.1016/j.chemphys.2007.06.028 ◽

2007 ◽

Vol 337 (1-3) ◽

pp. 39-47 ◽

Cited By ~ 2

Author(s):

Xinying Xue ◽

Jiuxun Sun

Keyword(s):

Equation Of State ◽

Thermodynamic Properties ◽

Analytic Equation ◽

Fluid Mixtures ◽

Wide Range

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Prediction of volumetric and thermodynamic properties of two aromatic–alcohol mixtures using GMA equation of state

Fluid Phase Equilibria ◽

10.1016/j.fluid.2008.03.016 ◽

2008 ◽

Vol 268 (1-2) ◽

pp. 61-67 ◽

Cited By ~ 4

Author(s):

Elaheh K. Goharshadi ◽

Maryam Abareshi

Keyword(s):

Equation Of State ◽

Thermodynamic Properties ◽

Aromatic Alcohol ◽

Alcohol Mixtures ◽

Gma Equation Of State

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A Rational Equation of State for Water and Water Vapor in the Critical Region

Journal of Heat Transfer ◽

10.1115/1.3688683 ◽

1964 ◽

Vol 86 (3) ◽

pp. 320-326 ◽

Cited By ~ 1

Author(s):

E. S. Nowak

Keyword(s):

Water Vapor ◽

Equation Of State ◽

Thermodynamic Properties ◽

Specific Heat ◽

Critical Point ◽

Critical Region ◽

Constant Pressure ◽

Parametric Equation ◽

Enthalpy And Entropy ◽

Specific Volumes

A parametric equation of state was derived for water and water vapor in the critical region from experimental P-V-T data. It is valid in that part of the critical region encompassed by pressures from 3000 to 4000 psia, specific volumes from 0.0400 to 0.1100 ft3/lb, and temperatures from 698 to 752 deg F. The equation of state satisfies all of the known conditions at the critical point. It also satisfies the conditions along certain of the boundaries which probably separate “supercritical liquid” from “supercritical vapor.” The equation of state, though quite simple in form, is probably superior to any equation heretofore derived for water and water vapor in the critical region. Specifically, the deviations between the measured and computed values of pressure in the large majority of the cases were within three parts in one thousand. This coincides approximately with the overall uncertainty in P-V-T measurements. In view of these factors, the author recommends that the equation be used to derive values for such thermodynamic properties as specific heat at constant pressure, enthalpy, and entropy in the critical region.

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Estimation of the Thermodynamic Properties of Branched Hydrocarbons

Journal of Energy Resources Technology ◽

10.1115/1.1286123 ◽

2000 ◽

Vol 122 (3) ◽

pp. 147-152 ◽

Cited By ~ 4

Author(s):

Hui He ◽

Mohamad Metghalchi ◽

James C. Keck

Keyword(s):

Thermodynamic Properties ◽

Degrees Of Freedom ◽

Statistical Thermodynamic ◽

Motion Modes ◽

Branched Alkanes ◽

Branched Hydrocarbons ◽

Wide Range ◽

On Line ◽

Kinetic Calculations ◽

Good Agreement

A simple model has been developed to estimate the sensible thermodynamic properties such as Gibbs free energy, enthalpy, heat capacity, and entropy of hydrocarbons over a wide range of temperatures with special attention to the branched molecules. The model is based on statistical thermodynamic expressions incorporating translational, rotational and vibrational motions of the atoms. A method to determine the number of degrees of freedom for different motion modes (bending and torsion) has been established. Branched rotational groups, such as CH3 and OH, have been considered. A modification of the characteristic temperatures for different motion mode has been made which improves the agreement with the exact values for simple cases. The properties of branched alkanes up to 2,3,4,-trimthylpentane have been calculated and the results are in good agreement with the experimental data. A relatively small number of parameters are needed in this model to estimate the sensible thermodynamic properties of a wide range of species. The model may also be used to estimate the properties of molecules and their isomers, which have not been measured, and is simple enough to be easily programmed as a subroutine for on-line kinetic calculations. [S0195-0738(00)00902-X]

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