Critical Point of Argon from Fluctuation of Potential Energy

Abstract

Critical point of argon was estimated from fluctuation of potential energy. Lennard-Jones potential was assumed in molecular dynamics simulation. Ensemble was canonical. Spinodal line was obtained from the temperature-dependence of the fluctuation of potential energy. Critical temperature was assigned as the maximum temperature in the spinodal line in the temperature-density space. The results were compared with the reported equation of state.