__Thermal Physics Unit T4 Kinetic Theory __

** Prerequisites:** T1 and T2

** Overview:** This unit turns to the microscopic picture of matter
as containing large numbers of atoms and/or molecules moving with a
distribution of speeds determined by the temperature. The ideal gas equation
of state can be understood in this picture, along with many other properties
such as viscosity, heat conductivity, and diffusion of gases.

__Read: ____ __

F. W. Sears and G. L. Salinger, *Thermodynamics, Kinetic Theory, and
Statistical Thermodynamics * (S&S) Chapt. 9 - Kinetic Theory; Chapt. 10 -
Intermolecular Forces and Transport Phenomena

** Comment:** One of the more difficult concepts in this unit is
that of molecular flux, covered at the beginning of Chapt. 9. Make sure you
understand this idea, and how molecules move with a range of speeds in all
possible directions, and how many averages needed to evaluate certain
quantities involve integrals over the three dimensional space of
velocities.

__After completing this unit you should understand:__

- Molecular flux.
- Derivation of the ideal gas equation of state PV = nRT from kinetic theory arguments.
- Pressure from the kinetic theory point of view.
- Mean free path.
- Viscosity.

__Problems:__

Chapt. 9: Problems 1,5,6,13,16,23; Chapt. 10, Problems 6,10,14,15;

Back to the Physics 323/324 Home Page.