Composition and thermodynamic properties of thermal plasma with condensed phases

The initial relations of a method for calculating the composition and thermodynamic properties of a closed heterogeneous system in thermodynamic equilibrium at constant pressure and temperature are given. The gaseous phase is always present in the system, and substances in the condensed state can also be present, which are divided into several condensed phases. The essence of the method consists in the minimizing the Gibbs energy of a system in ideal state. The application possibilities of the method described are discussed in detail. The main aim of the article is to provide solutions to problems arising in the calculations of composition and thermodynamic properties. These problems are not only of physico-chemical nature but they also relate to the numerical calculations and stability. The nature of the problems is general and independent of computation method.