Using distribution functions to formulate a new quantity

If there were no interactions present gAB = l.lfthere are interactions present, then g B 1 

A further quantity can now be defined. The integral Gab is related to the quantity gAB 1 by the expression  

In the solution there will be positive ions, negative ions and the solvent and there will be six 

Each of these gs will contain contributions to the total potential energy from aU the interactions which are likely to be present in such an ionic solution, viz., all possible ion-ion interactions, all possible ion-solvent interactions and all possible solvent-solvent interactions. 

Each of these radial distribution functions is related to one of the corresponding integrals  

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