Calculation of some thermodynamic properties of air plasmas: Internal partition functions, plasma composition, and thermodynamic functions

1987 ◽  
Vol 7 (1) ◽  
pp. 53-87 ◽  
Author(s):  
J. Bacri ◽  
S. Raffanel
Keyword(s):  
Thermodynamic Properties ◽  
Thermodynamic Functions ◽  
Partition Functions ◽  
Plasma Composition ◽  
Air Plasmas ◽  
Internal Partition

Thermodynamische Zustandsgrößen von Alkalimetallplasmen und von deren Komponenten / Thermodynamic Properties of Alkali Metal Plasmas and of their Components

1973 ◽  
Vol 28 (10) ◽  
pp. 1676-1686 ◽  
Author(s):  
F. W. Reiter
Keyword(s):  
Thermodynamic Properties ◽  
Alkali Metal ◽  
Thermodynamic Functions ◽  
Chemical Equilibrium ◽  
Alkali Metals ◽  
Ideal Gas ◽  
Partition Functions ◽  
Quantum Numbers ◽  
Internal Partition ◽  
Charged Ions

Thermodynamic functions of plasmas of alkali metals and of their components - diatomic molecules, atoms, simply charged ions and electrons - are calculated in the temperature range 298.15 °K -10000 °K. At this it is supposed, that the plasma is in thermodynamic and chemical equilibrium and in an ideal gas state.The internal partition functions of the components of the plasmas are calculated by summation term by term up to characteristic quantum numbers. These characteristic quantum numbers are determined by graphic and calculating methods.The thermodynamic functions of alkali metal plasmas and their components are discussed and compared with results calculated by approximative methods.

Electrochemical and thermodynamic properties of U4+ and U3+ on Mo electrode in LiCl-KCl eutectic

2019 ◽  
Vol 107 (2) ◽  
pp. 95-104
Author(s):  
Ru-Shan Lin ◽  
You-Qun Wang ◽  
Zhao-Kai Meng ◽  
Hui Chen ◽  
Yan-Hong Jia ◽  
...  
Keyword(s):  
Free Energy ◽  
Thermodynamic Properties ◽  
Thermodynamic Functions ◽  
Electrochemical Behavior ◽  
Diffusion Coefficients ◽  
Electrochemical Techniques ◽  
Reduction Process ◽  
Standard Potential ◽  
Hcl Gas ◽  
Thermodynamic Functions Of Formation

Abstract In this study, UCl4 was prepared by the reaction of HCl gas with UO2 in the LiCl-KCl eutectic. Then, the electrochemical behavior of U4+ and U3+ on a Mo cathode was investigated by various electrochemical techniques. The reduction process of U4+ was regarded as two steps: U4++e=U3+; U3++3e=U. Diffusion coefficients of U4+ and U3+, the apparent standard potential of U4+/U3+, U3+/U as well as U4+/U in the LiCl-KCl molten salt on the Mo electrode was determined by numerous electrochemical methods. The thermodynamic functions of formation of Gibbs free energy of UCl4 and UCl3 are calculated as well.

REMC computer simulations of the thermodynamic properties of argon and air plasmas

2002 ◽  
Vol 100 (15) ◽  
pp. 2487-2497 ◽  
Author(s):  
MARTIN LÍSAL ◽  
WILLIAM R. SMITH ◽  
MICHAL BUREŠ ◽  
VÁCLAV VACEK ◽  
JIŘÍ NAVRÁTIL
Keyword(s):  
Thermodynamic Properties ◽  
Computer Simulations ◽  
Air Plasmas

Computation of Thermodynamic Properties of Carbon Dioxide in the Range 0–750 Deg C

1970 ◽  
Vol 92 (3) ◽  
pp. 301-309 ◽  
Author(s):  
G. Angelino ◽  
E. Macchi
Keyword(s):  
Carbon Dioxide ◽  
Thermal Properties ◽  
High Temperature ◽  
Thermodynamic Properties ◽  
Thermodynamic Functions ◽  
Critical Region ◽  
Density Measurement ◽  
Working Fluid ◽  
Power Cycles ◽  
Wide Range

The computation of power cycles employing carbon dioxide as working fluid and extending down to the critical region requires the knowledge of the thermodynamic properties of CO2 within a wide range of pressures and temperatures. Available data are recognized to be insufficient or insufficiently accurate chiefly in the vicinity of the critical dome. Newly published density and specific heat measurements are employed to compute thermodynamic functions at temperatures between 0 and 50 deg C, where the need of better data is more urgent. Methods for the computation of thermal properties from density measurement in the low and in the high temperature range are presented and discussed. Results are reported of the computation of entropy and enthalpy of CO2 in the range 150–750 deg C and 40–600 atm. The probable precision of the tables is inferred from an error analysis based on the generation, by means of a computer program of a set of pseudoexperimental points which, treated as actual measurements, yield useful information about the accuracy of the calculation procedure.

scholarly journals Thermodynamic Study of Tl6SBr4 Compound and Some Regularities in Thermodynamic Properties of Thallium Chalcohalides

2017 ◽  
Vol 2017 ◽  
pp. 1-9 ◽  
Author(s):  
Dunya Mahammad Babanly ◽  
Qorkhmaz Mansur Huseynov ◽  
Ziya Saxaveddin Aliev ◽  
Dilgam Babir Tagiyev ◽  
Mahammad Baba Babanly
Keyword(s):  
Phase Diagram ◽  
Thermodynamic Properties ◽  
Thermodynamic Functions ◽  
Chemical Bonding ◽  
Electromotive Force ◽  
Solid Phase ◽  
Thermodynamic Study ◽  
Degree Of Ionization ◽  
Emf Measurements ◽  
Concentration Cells

The solid-phase diagram of the Tl-TlBr-S system was clarified and the fundamental thermodynamic properties of Tl6SBr4 compound were studied on the basis of electromotive force (EMF) measurements of concentration cells relative to a thallium electrode. The EMF results were used to calculate the relative partial thermodynamic functions of thallium in alloys and the standard integral thermodynamic functions (-ΔfG0, -ΔfH0, and S0298) of Tl6SBr4 compound. All data regarding thermodynamic properties of thallium chalcogen-halides are generalized and comparatively analyzed. Consequently, certain regularities between thermodynamic functions of thallium chalcogen-halides and their binary constituents as well as degree of ionization (DI) of chemical bonding were revealed.

Introduction

1984 ◽  
Author(s):  
C. G. Gray ◽  
K. E. Gubbins
Keyword(s):  
Thermodynamic Properties ◽  
Thermodynamic Functions ◽  
Energy Levels ◽  
Virial Coefficients ◽  
Intermolecular Forces ◽  
Great Accuracy ◽  
Perfect Gas ◽  
Mathematical Basis ◽  
Virial Series ◽  
Simple Molecules

The application of statistical mechanics to the study of fluids over the past fifty years † or so has progressed through a series of problems of gradually increasing difficulty. The first and most elementary calculations were for the thermodynamic functions (heat capacities, entropies, free energies, etc.) of perfect gases. These properties are related to the molecular energy levels, which for perfect gases can be determined theoretically (by quantum calculations) or experimentally (by spectroscopic methods, for example). For simple molecules (CO2 , CH4 , etc.) the energy levels, and hence the thermodynamic properties, can be determined with great accuracy, and even for quite complex organic molecules it is now possible to obtain thermodynamic properties with satisfactory accuracy. With the advent of digital computers it became possible to calculate thermodynamic properties for a wide variety of substances and temperatures, and several useful tabulations of perfect gas properties now exist. Having successfully treated the perfect gas, it was natural to consider gases of moderate density, where intermolecular forces begin to have an effect, by expanding the thermodynamic functions in a power series (or virial series) in density. Although the mathematical basis for a theoretical treatment of this series was laid by Ursell in 1927, it was not exploited until ten years later, when Mayer re-examined the problem. Since that time a great deal of effort has been put into evaluating the virial coefficients that appear in the series for a variety of intermolecular force models. As the expressions for the virial coefficients are exact, they provide a very useful means of checking such force models by comparison of calculated and experimental coefficients. While the theory of dilute gases at equilibrium is essentially complete, this is far from being the case for all dense gases and liquids. The virial series cannot be applied directly to liquids. As an alternative to the ‘dense gas’ approach to liquids, there were early attempts to treat liquids as disordered solids by using cell or lattice theories; these were popular from the mid-1930s until the early 1960s.

scholarly journals Heat Capacities and Thermodynamic Properties of Hungchaoite and Mcallisterite

Molecules ◽  
2019 ◽  
Vol 24 (24) ◽  
pp. 4470
Author(s):  
Jiangtao Song ◽  
Fei Yuan ◽  
Long Li ◽  
Yafei Guo ◽  
Tianlong Deng
Keyword(s):  
Phase Transition ◽  
Thermodynamic Properties ◽  
Thermodynamic Functions ◽  
Process Design ◽  
Chemical Engineering ◽  
Heat Capacities ◽  
Salt Lakes ◽  
Engineering Process ◽  
Thermal Anomalies ◽  
First Time

The heat capacities on two minerals of hungchaoite (MgB4O7·9H2O, Hu) and mcallisterite (MgB6O10·7.5H2O, Mc) have been measured with a precision calorimeter at temperatures ranging from 306.15 to 355.15 K, experimentally. It was found that there are no phase transition and thermal anomalies, and the molar heat capacities against temperature for the minerals of hungchaoite and mcallisterite were fitted as C p , m , Hu   =   − 27019.23675 + 229.55286 T   −   0.63912 T   2   +   ( 5.95862   ×   10   − 4 )   T   3 and C p , mMc   =   − 9981.88552   +   84.10964 T   −   0.22685 T   2   +   ( 2.0593   ×   10   − 4 )   T   3 , respectively. The molar heat capacities and thermodynamic functions of (HT-H298.15), (ST-S298.15), and (GT-G298.15) at intervals of 1 K for the two minerals were obtained for the first time. These results are significant in order to understand the thermodynamic properties of those minerals existing in nature salt lakes, as well as applying them to the chemical engineering process design.

Erratum: Partition Functions and Thermodynamic Properties of Nitrogen and Oxygen

1965 ◽  
Vol 8 (12) ◽  
pp. 2304 ◽  
Author(s):  
K. S. Drellishak ◽  
D. P. Aeschliman ◽  
Ali Bulent Cambel
Keyword(s):  
Thermodynamic Properties ◽  
Partition Functions
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