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:

- understand such ideas as phase changes and chemical potential.
- understand low temperature phenomena from a macroscopic and microscopic point of view.
- understand the basic concepts of statistical mechanics and their application to investigate the properties of matter.

**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

Superconductivity

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**

**Books**
**** 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