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.

References

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

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