Screencast 8.1
www.youtube.com/watch?v=4-DwaHq8vNU
This screencast explains the importance of getting the units right when you use the ideal gas law

Screencast 8.2
www.youtube.com/watch?v=yEvCY6WboEM
This screencast explains how equation 8.13b links the kinetic theory to the empirical ideal gas equation

Screencast 8.3
www.youtube.com/watch?v=f1_MGPknbsg
This screencast explains the significance of Equation 8.19 and the way molecular speed is linked to temperature and molar mass.

Screencast 8.4
www.youtube.com/watch?v=ASf_aKYc0K8
This screencast explains collision cross-section by talking you through Figure 8.15.

Screencast 8.5
www.youtube.com/watch?v=e_wjaizuIUA
This screencast explains mean free path and walks you through Equation 8.23.

Screencast 8.6
www.youtube.com/watch?v=aE_9QY61up0
This screencast walks you through the Van der Waals equation (Equation 8.25).