Equations of state for the Lennardhyphen;Jones potential calculated from a parametric integral equation

摘要

A parametric integral equation is tested by obtaining radial distribution functions along an isotherm (T* equals; 2.74) for a system of particles interacting via the Lennardhyphen;Jones potential. The parameter is fixed to give good agreement between the pressure as obtained from Monte Carlo simulation and the integral equation at high density. The agreement between Monte Carlo simulation and integral equation pressures and energies over the fluid portion of the isotherm is good. The integral equation solutions are used to obtain Padeacute; approximant equations for the energy and pressure as a function of density for theT* equals; 2.74 isotherm.