Abstract
Consideration of the spherically smoothed
mutual potential energy between nearly spherical polyatomic molecules leads to
the conclusion that it can often be well represented by a (28,7) type of
Lennard-Jones potential. Second and third virial coefficients have been
calculated for this potential and also for (∞,6) and (∞,7)
potentials.
The (28,7) interaction energy gives a good
description of the properties of gases of quasi-spherical molecules. For these
gases it is markedly superior to the more usual (12,6) potential.
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