COMPOSITION AND THERMODYNAMIC PROPERTIES OF REACTING GAS MIXTURES UNDER HIGH PRESSURE USING THE LEWIS AND RANDALL RULE

摘要

A set of equations is developed from which the chemical composition and real-gas correction terms for the thermodynamic properties of a reacting gas mixture at relatively high pressure can be calculated. This method utilizes the second virial coefficients of each of the species in their pure state and employs the Lewis and Randall rule to obtain the properties of the mixture. Results based on the present approximate calculation are compared with calculations of Hilsenrath and Klein for air. It is found that the present approxi mate method yields essentially the same chemical composition for the mixture as was obtained by the more rigorous method at a temperature of 6,000° K and pressures of about 2,500 atm and 4,500 atm. The corresponding real-gas correction terms for the enthalpy and entropy of the mixture are also in very good agreement with the results presented by Hilsenrath and Klein. Some considerations regarding application of this simplified method to reacting gas mixtures other than high-temperature air are also presented.