Dieterici equation of state

Dieterici equation of state

[dē·də′rē·chē i′kwā·zhen əv ′stāt]
(thermodynamics)
An empirical equation of state for gases, pea/vRT (v - b) = RT, where p is the pressure, T is the absolute temperature, v is the molar volume, R is the gas constant, and a and b are constants characteristic of the substance under consideration.
References in periodicals archive ?
It can of course be used merely as an interpolation formula for moderately accurate calculations of pressure within a limited range at a particular temperature for which parameters a and b are optimal, but, for this purpose, other empirical equations of state yield superior results; for instance in the vicinity of the critical point, the Dieterici equation of state is remarkably accurate and "is the best allround analytic two-constant equation of state" [3].