Cubic Equations of State
name
(year)
Equations of State
(EOS)
van der Waals
(1873)
0.421875
0.125
---
Redlich/Kwong
(1949)
0.42748T
c
1/2
0.08664
---
Soave/Redlich/Kwong
(1972)
0.42748
0.08664
Peng/Robinson
(1976)
0.45724
0.07780