PREDICTION OF THE LIQUID-VAPOR-EQUILIBRIUM PRESSURE USING THE QUASI-GAUSSIAN ENTROPY THEORY

We derived a method to evaluate the liquid-vapor equilibrium pressure, with high accuracy over a large range of temperature, using the quasi -Gaussian entropy theory. The final expression that we obtain for the equilibrium pressure as a function of the temperature can be considere d as a very accurate approximate solution of the Clausius-Clapeyron eq uation. The method was applied to water, methanol and mercury, and was compared to two usual approximations of the Clausius-Clapeyron equati on. (C) 1995 American Institute of Physics.