Statistical Thermodynamics of a Dipole Hard Sphere Liquid. Hindered Rotation Model

Approximate analytical expressions are obtained using the hindered molecular rotation model to describe the thermodynamic properties of a model polar liquid of dipolar hard spheres; the results are in good agreement with the available computer simulation data. A polar liquid is represented as a macromolecular knot of particles bonded by dipole forces. The resulting formulas correspond to the first and second neighbor interaction approximation. The formulas may be applied to classical one-dimensional systems described by the Ising or Heisenberg Hamiltonians.