Evaluation of the Applicability of Different Equations of State of the Real Gas for Ethylene

The paper presents a technique for obtaining the dependencies of the thermophysical properties of ethylene on the pressure and temperature. The dependencies were obtained using Lee–Kesler, Lee–Erbar–Edmister, Redlich–Kwong equations of state and the virial equation for the real gas. The limits of applicability of the equations of state of the real gas for determining thermophysical properties of ethylene over a wide range of pressure and temperature values are shown. Graphs showing the dependences of the density and heat capacity on the temperature with a pressure change in the range from 0.1 to 20 MPa are presented. The total relative errors in the determination of the density and heat capacity of ethylene are calculated using the Lee–Kesler equation.

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