APPLICATION OF THE LINEAR ISOTHERM REGULARITY TO SELECTED FLUID SYSTEMS

Dense hard-sphere and Lennard-Jones fluids and also liquid mercury and water are studied to see if they obey the linear isotherm regularity suggested by Parsafar and Mason. For dense hard-sphere fluids a behavi or consistent with the regularity is observed. Data from simulations o f the Lennard-Jones fluid were observed to follow the trends proposed by the regularity. For mercury, agreement between the experimental dat a and the predictions of the regularity is obtained. This suggests tha t the scope of the regularity can be extended to include liquid metals . In the case of water, for pressure ranges that are not too large, qu antitative agreement with the predictions of the regularity can be obt ained. Over larger ranges of pressure, systematic deviations appear, b ut the agreement is still satisfactory. Based on the model previously proposed for the regularity, a discussion of some aspects of the param eters in the equation is given.