Screencast 14.1
www.youtube.com/watch?v=D6UHc47ONg0
This screencast explains the variation of entropy with temperature.

Screencast 14.2
www.youtube.com/watch?v=H7U7M3t-6l0
This screencast walks you through Worked Example 14.4, the calculation of the standard entropy of chlorine gas at 298 K.

Screencast 14.3
www.youtube.com/watch?v=eRDjNQt3PJQ
This screencast explains entropy change in the surroundings and introduces Gibbs Energy change.

Screencast 14.4
www.youtube.com/watch?v=E6T1eUeRngU
This screencast explains the variation of Gibbs Energy change with temperature.