Properties of non-ideal gas in the Ishikawa–Chung–Lu model

In the framework of thermodynamic method the properties of non-ideal gas are considered in the paper, using the Ishikawa–Chung–Lu equations of state. The parameters of the equation are expressed by characteristics of critical state and reduced form of the equation is found as well. Analytical relations are derived for physical parameters, entropy, and thermodynamic potentials of gas. The Joule–Thomson process is considered, the shape of the inversion curve of the sign of the effect in the reduced variables is determined. Expressions for the parameters of the equation are found ensuring the coincidence of the argon inversion curve with the experimental results.