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Peng and Robinson equation of state

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The Peng and Robinson equation of state is given by (Ref. 1 Eq. 4)

p = \frac{RT}{v-b} - \frac{a(T)}{v(v+b) +b(v-b)}

where p is the pressure, T is the temperature and R is the molar gas constant.


  1. Ding-Yu Peng and Donald B. Robinson "A New Two-Constant Equation of State", Industrial & Engineering Chemistry Fundamentals 15 pp. 59 - 64 (1976)