Van der Waals equation
Johannes Van der Waals was interested in the kinetic theory of gases and fluids, and his primary work was to develop an equation which applied to real gases, unlike that of Robert Boyle which assumes that there are no attractive forces between molecule and that molecules have zero volume.
In reality, molecules have a small volume and attractive forces exist between them. Van der Waals introduced these properties into the theory by means of two constants, which were specific to each gas:
(P + a/v2)(v-b) = RT, where a and b are constant for a particular gas.
Van der Waals was awarded a Nobel prize in 1910 for his work on the equation of state of gases and liquids.
The weak, electrostatic attractions between atoms were named Van der Waals forces in his honour.