A Model for Sub-critical Liquid-Vapour Coexistence in Sodium

S. M. Osman, W. H. Young

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

The Hamiltonian of the ions in liquid sodium is obtained from pseudopotential perturbation theory, and the free energy is evaluated using the Gibbs-Bogoliubov variational technique together with a hard sphere reference system. The free energy of the vapour is obtained by supposing it to be a monomer-dimer mixture. The two descriptions are then combined to provide a theory of coexistence. This yields satisfactory results for the various thermodynamic properties up to a few hundred degrees short of the critical temperature.

Original languageEnglish
Pages (from-to)181-194
Number of pages14
JournalPhysics and Chemistry of Liquids
Volume17
Issue number3
DOIs
Publication statusPublished - Dec 1 1987

Fingerprint

Free energy
Sodium
free energy
Vapors
sodium
vapors
liquid sodium
Variational techniques
Hamiltonians
reference systems
Liquids
liquids
Dimers
pseudopotentials
critical temperature
Thermodynamic properties
thermodynamic properties
monomers
perturbation theory
Monomers

Keywords

  • dimers
  • hard spheres
  • Monomers
  • pseudopotential

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Materials Chemistry

Cite this

A Model for Sub-critical Liquid-Vapour Coexistence in Sodium. / Osman, S. M.; Young, W. H.

In: Physics and Chemistry of Liquids, Vol. 17, No. 3, 01.12.1987, p. 181-194.

Research output: Contribution to journalArticle

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