Abstract
The abilities of several equations of state in fitting p-V-T data of pure fluids have been compared. Also the temperature dependence of the characteristic parameters of each substance has been studied. All the equations of state discussed are of the form: p = p (ref) + p (att) where p(ref) accounts for the repulsive contributions to the pressure, while p(att) contains the contributions from the attractive forces. The best results correspond to an equation derived by Miyano and Masuoka from a perturbation theory, though Deiters equation gives results which are almost comparable to Miyano's one and it seems that Deiters equation is more suitable for further improvements and extension to more complex fluids.
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