Law of corresponding states is a empirical law which encapsulates the finding that the equations of state for many real gases are remarkably similar when the are expressed in terms of reduced temperatures (T<sub>r</sub> = T/t<sub>c</sub>), pressures, (p<sub>r</sub> = p/p<sub>c</sub>) and volumes (v<sub>r</sub> = V/V<sub>c</sub>).