Chapter 14, Problem 14.1IA

Interpretation Introduction

Interpretation:

The mean interaction energy of $N$ atom which interact with a potential energy of the form $C_6/R^6$ is given by the expression $U=-2N^2{C}_6/3V{d}^3$ has to be shown.  The relation between the van der Waals parameter $a$ and $C_6$ has to be stated.

Concept introduction:

Potential energy of a particle or a system is energy due to its state.  The potential energy of a moving object is zero.  When two particles attract each other, then the potential energy of the system is negative.  When two particles repel each other, then the potential energy of the system is positive.