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Equilibrium composition and thermodynamic properties of high‐temperature gas‐mixtures
Author(s) -
Lyhs Wilfried,
Wilhelmi Herbert
Publication year - 1982
Publication title -
archiv für das eisenhüttenwesen
Language(s) - English
Resource type - Journals
eISSN - 1869-344X
pISSN - 0003-8962
DOI - 10.1002/srin.198205131
Subject(s) - thermodynamics , chemistry , plasma , partition function (quantum field theory) , partition coefficient , physics , organic chemistry , nuclear physics , quantum mechanics
The composition and thermodynamic properties of a gas plasma in thermal equilibrium can be computed from the partition functions of all particles in the plasma. Partition functions of atoms are determined from tabulated and extrapolated energy levels and under consideration of a so called cut‐off criterion. The partition functions of molecules containing two atoms are evaluated from spectroscopic constants and with the assumption that the potential between the atoms can be described by a Morse‐function. As an example, an oxygen‐iron‐plasma and an air‐silicon‐plasma in a temperature range from 2000 K to 35 000 K are computed with this procedure.