H Zarie - Department of Physical Chemistry, faculty of chemistry ,Bu-Ali Sina University, Hamedan, Iran
R Mohamadkhani - Department of Physical Chemistry, Bu-Ali Sian University, Hamedan, Iran

Excess quantities are useful measures of the effects of molecular interactions onthermodynamic properties of liquid mixtures [1]. Measurements of excess molar volumes athigh temperatures and pressures are difficult and often consume a lot of chemicals and lots oftime. In fact, this study is continue of the previous paper [2]. In this study, the NRTL modelwas modified by expressing the interaction parameter of the model as a function oftemperature and pressure to improve the accuracy and ability of spontaneous correlation ofexperimental data at different pressures and temperatures.