Calculation of Thermodynamic properties of Fluid Using a New Equation of State

Document Type : Research Article


Department of Chemistry, Isfahan University of Technology, Isfahan, I.R. IRAN



Using the Lennard-Jones (12-6) potential, a new equation of state is obtained that can predict properties of both gases and liquids relatively well. This equation of state is given as (Z-a)V2=(A/V2)-B, where Z is the compressibility factor, A and B are constants, and a is an adjustable parameter that depends on the temperature, volume and the nature of the fluid, and its expressions depends upon the fluid status. In this paper, appropriate expressions for argon are given for a, in the liquid region when 0.6<Tr<1, and in the gaseous region when 1.1<Tr


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