On New Ideal (Noninteracting) Gases in Supercritical Thermodynamics

Isotherms obtained on the basis of a new distribution are compared with isotherms of the famous van der Waals model, using a language easily understood by engineers and undergraduates (without proofs or theorems, which can be found in the given references, but with elementary examples and simple associations). We propose a new interpretation of the van der Waals model. On the Hougen–Watson diagram, the domain where the mixing of gases occurs with maximum rate is indicated. A new distribution is presented, the notion of new ideal gas is introduced, and the invariants of the isotherms introduced by the author are explained.