Practical Treatment of Coupled Gas Equilibrium

Abstract

Equations are derived for the species concentrations in coupled chemical equilibria in the gas phase. This is done both for the method of the direct minimization of the free energy as well as for the equilibrium constant method. The relations developed are such as to allow for the inclusion of detailed real gas effects. The emphasis is on practical problems encountered in the actual calculation of the species and the thermodynamic properties. Expressions are derived for the direct calculation of the concentration derivatives with respect to temperature and density required for the calculation of the derived properties (i.e., specific heats, sound velocities, etc.). Considerable space is given to discussions of the non-linear numerical methods available for the solution of the non-linear equations for the species concentrations.

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Document Details

Document Type
Technical Report
Publication Date
Mar 01, 1971
Accession Number
AD0720804

Entities

People

  • Max Klein

Organizations

  • National Institute of Standards and Technology

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Air Force
  • Algorithms
  • Chemical Equilibrium
  • Chemical Reaction Properties
  • Chemical Reactions
  • Computer Programs
  • Computers
  • Energy
  • Equations
  • Equations Of State
  • Free Energy
  • Ionization
  • Jet Propulsion
  • Mechanical Engineering
  • Quantum Numbers
  • Specific Heat
  • Thermodynamic Properties

Readers

  • Calculus or Mathematical Analysis
  • Fluid Dynamics.
  • Molecular Photonics/Laser Physics

Technology Areas

  • Space
  • Space - Hall-Effect Thruster