Simplified perturbed hard chain

This is a simple, yet powerful noncubic EOS of the “perturbed hard chain” class. The attraction term is based on a square-well potential. The EOS has correct high-temperature limiting behaviour.

The critical compression factor of this EOS is outside the experimentally observed range.

adjustable parameters: 3

For mixture calculations the following mixing theories are available:

- 1F: van der Waals 1-fluid mixing theory

[1] C.-H. Kim, P. Vimalchand, M. D. Donohue, and S. I. Sandler,
*AIChE J.* 32 (1986) 1786–1734.

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