Extraction of Experimental Rules of Dense Fluids Using the LIR Theory; Monatomic fluids

In this paper, the linear isotherm regularity (LIR) equation of state has been used to predict some of the most important thermodynamic quantities and also a series exploring the physical consequences in dense fluids. A new method in this paper is introduced to derive these empirical rules from the LIR equation of state. Thus, first, the thermodynamic quantities are extracted and then verified by the experimental data. The monatomic fluids whose experimental data are used to test the ability of the equation of state are helium, neon, argon, krypton and xenon. Boyle’s temperature and density are also derived in this paper for monatomic fluids, which is in good agreement with the quantities reported in literatures. The modified model was compared with the other two-parameter equation of state and the results showed the modified model can provide better correlation results with the average absolute relative deviation.