The Law of Mass Action by Unknown

Author:Unknown
Language: eng
Format: epub
Publisher: Springer-Verlag Wien 2012
Published: 2015-04-13T16:00:00+00:00

In liquids there is no long-range order, therefore molecular interactions are taken into account in a slightly different way. They are divided into two parts: (i) those with the molecules of the first coordination sphere (described by (5.27)) and (ii) those with all other molecules. The number of nearest neighbours in liquids (the effective coordination number, c) is usually known and their contribution to the total potential energy is Ncφ/2.

The effects of molecules outside the first coordination sphere in liquids are estimated assuming these layers to be a continuum. If the concentration of molecules in a liquid is some constant value4 q = (N/V), then the number of molecules in a spherical layer of the radius r and thickness dr is q4πr2dr. The total energy of interaction of a given molecule with molecules outside the first coordination sphere can be found by integration over the distances from the radius of the border between first and second coordination spheres (R2) to infinitely large distances: (5.32)

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