Statistical Mechanics · Problem 9.8

Statistical Mechanics of Interacting Systems: The Method of Quantized Fields — R. K. Pathria

Physics — Statistical Mechanics · intermolecular-force-solid-surfaces

Problem

The molecules of a solid attract one another with a force

F(r) = \alpha(1/r)^5

. Two semi-infinite solids composed of

n

molecules per unit volume are separated by a distance

d

, i.e. the solids fill the whole of the space with

x \leq 0

and

x \geq d

. Calculate the force of attraction, per unit area of the surface, between the two solids.