Experimental Study of Ultrasonic and Volumetric Properties | Original Article
The volume and energy calculated for liquids in this theory were found to be close with the experimental values. But this theory fails to predict the entropy values. Prigogine and Garikian (Ali and Tariq, 2008) used this approach and obtained a complicated expression for the potential function. Prigogine et al. (Bhatia et. al., 2009, Roy et. al., 2007) used smoothed potential model by substituting square well potential for Lennard-Jones and Devonshire potential. When the difference in size of component molecules is small, this theory predicts positive excess free energy and large excess volume for mixtures. Molecular models are used to specify both the nature of the process and to derive equations for physicochemical properties.