Module Identifier PH31510  
Module Title THERMAL PHYSICS 2  
Academic Year 2000/2001  
Co-ordinator Dr Eleri Pryse  
Semester Semester 2  
Other staff Dr Geraint Thomas, Dr Geraint Vaughan  
Pre-Requisite Core Physics Modules at Levels 1 & 2  
Course delivery Lecture   20 lectures  
  Seminars / Tutorials   2 workshops  
Assessment Exam   End of semester examinations   80%  
  Course work   Example sheet 1 Deadline (by week of Semester): Week 5   10%  
  Course work   Example sheet 2 Deadline (by week of Semester): Week 10   10%  

Module description
This module aims to:
a) build on the introductory thermodynamics course, introducing such ideas as phase changes and chemical potential.
b) introduce phenomena that occur at low temperatures, and to explain these from both a macroscopic and a microscopic point of view.
c) introduce the concept of statistical mechanics, and use these in particular to investigate the properties of matter.

Learning outcomes
After taking this module students should be able to:

Outline syllabus

Reminder: Thermodynamic potentials, Maxwell relations, thermodynamic variables

First order phase changes: Gibbs function and Clausius-Clapeyron equation

Second and higher order phase changes
Ehrenfests classification, examples of different order

Adiabatic demagnetisation: attainment of very low temperatures
Chemical Potential and its applications to open systems

Third Law of thermodynamics: entropy near absolute zero
Negative temperatures and population inversion

Superfluidity: properties of liquid helium

Statistical Mechanics
Assembly of distinguishable particles: Boltzmann distribution, Partition function, link to thermodynamic quantities, examples
Assembly of indistinguishable particles (gases): Fermi-Dirac and Bose-Einstein distributions, Maxwell-Boltzmann distribution, examples

Reading Lists
** Recommended Text
D.H. Trevana. Statistical Mechanics. Ellis Horwood
C. Finn. Thermal Physics. Chapman Hall
** Supplementary Text
A. Kent. Experimental Low-Temperature Physics. MacMillan
P. Reidi. Thermal Physics. Oxford Scientific