The Dielectric Constant of Water and Debye‐Hückel Limiting Law Slopes

Experimental values of the dielectric constant of water suggest that, for temperatures greater than 400 K, the integral in the Kirkwood dielectric‐constant equation, which involves the intermolecular potential function, is a simpler function of temperature and pressure than of temperature and densit...

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Bibliographic Details
Published inJournal of physical and chemical reference data Vol. 19; no. 2; pp. 371 - 411
Main Authors Archer, Donald G., Wang, Peiming
Format Journal Article
LanguageEnglish
Published Melville, NY American Institute of Physics 01.03.1990
Subjects
Chemistry
Electrochemistry
Electrodes: preparations and properties
Exact sciences and technology
General and physical chemistry
PERMITTIVITY
REVIEWS
THERMODYNAMIC PROPERTIES
VERY HIGH PRESSURE
thermodynamic properties of aqueous electrolytes
CORRELATIONS
water
ELECTROLYTES
dielectric constant
DATA ANALYSIS
DEBYE−HUECKEL THEORY
MEDIUM TEMPERATURE
Debye‐Hückel limiting law
LOW TEMPERATURE
AQUEOUS SOLUTIONS
EQUATIONS OF STATE
HIGH PRESSURE
EXPERIMENTAL DATA
HIGH TEMPERATURE
Water
Temperature
Electrolyte solution
Numerical data
Experimental study
Thermodynamic properties
Permittivity
Comparative study
Inorganic compound
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Summary:Experimental values of the dielectric constant of water suggest that, for temperatures greater than 400 K, the integral in the Kirkwood dielectric‐constant equation, which involves the intermolecular potential function, is a simpler function of temperature and pressure than of temperature and density. An equation has been fitted to values of this integral calculated from experimental values of the dielectric constant for temperatures from 238.15 K to 823.15 K and to pressures of approximately 500 MPa for temperatures greater than 273 K. The equation of ε thus has explicit variables T, ρ, p and gives a good representation of the available experimental results. The quality of representation of the experimental results has been compared to that of previous correlations of the dielectric constant. The new equation is applicable through wider regions of independent variables than the previous equations and is capable of sufficient accuracy to provide values of Debye–Hückel limiting law slopes which are as accurate as the experimental results allow. Values of Debye‐Hückel limiting‐law slopes are tabulated.
ISSN:0047-2689
1529-7845
DOI:10.1063/1.555853