Forces in Mixtures of Spherical, Non-polar Molecules Formal Description

iatennolecular Forces in Mixtures of Spherical, Non-Polar Molecules. Formal Description 

Let us now consider intermolecular forces in mixtures of spherical non-polar molecules. For simplidty we shall consider a binary mixture 

One of our main problems in the subsequent chapters will be to express the thermodynamic excess functions of solutions in terms of the quantities sy, which appear in the law of force (2.7.1). If 

A special simple case arises when the molecules have the same radius 

The parameter d expresses the difference of the depths of interaction of molecules AA and BB. It is normalized with respect to saa to obtain a quantity which is Often small with respect to unity. This will 

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