Clausius equation of state

The Clausius equation of state is given by

$\left[P+{\frac {a}{T(v+c)^{2}}}\right](v-b)=RT$

where

$a=v_{c}-{\frac {RT_{c}}{4P_{c}}}$

$b={\frac {3RT_{c}}{8P_{c}}}-v_{c}$

and

$c={\frac {27R^{2}T_{c}^{2}}{64P_{c}}}$

References

1. R. Clausius "", Ann. Phys 9 pp. 337- (1880)