Question: 24 for a system consisting of n atoms and possessing...

2.4. For a system consisting of N atoms and possessing n such Schottky defects write down the Helmholtz free energy F(n). For a system in thermal equilibrium in a heat bath at temperature T the Helmholtz free energy is a minimum. Use this property to determine the temperature dependence of the concentration n/N of Schottky defects.