Dieterici equation of state

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The Dieterici equation of state, proposed in 1899 (Ref. 1) is given by

\left. p(v-b) \right.= RT e^{-a/RTv}


a = \frac{4R^2T_c^2}{P_ce^2}



where p is the pressure, T is the temperature and R is the molar gas constant. T_c is the critical temperature and P_c is the pressure at the critical point.


  1. C. Dieterici, Ann. Phys. Chem. Wiedemanns Ann. 69, 685 (1899)
  2. K. K. Shah and G. Thodos "A Comparison of Equations of State", Industrial & Engineering Chemistry 57 pp. 30 - 37 (1965)
  3. Richard J. Sadus "Equations of state for fluids: The Dieterici approach revisited", Journal of Chemical Physics 115 pp. 1460-1462 (2001)