A highly accurate equation of state (EOS) for chain molecules formed from spherical
segments interacting through Mie potentials (ie, a generalized Lennard-Jones form with
variable repulsive and attractive exponents) is presented. The quality of the theoretical
description of the vapour-liquid equilibria (coexistence densities and vapour pressures) and
the second-derivative thermophysical properties (heat capacities, isobaric thermal
expansivities, and speed of sound) are critically assessed by comparison with molecular …