Khan Academy
Khan Academy: Entropy Intuition
Introduces second law of thermodynamics. A discussion of entropy change in terms of heat and microstates. [19:15]
Khan Academy
Khan Academy: Why Heat Increases Entropy
Did you know why heat increases entropy? This covers how entropy relates to biology and how it can do some work! [7:01]
Khan Academy
Khan Academy: A Look at a Seductive but Wrong Gibbs Spontaneity Proof
This video looks at why the 'proof' of the relation between changes in Gibbs Free Energy and Spontaneity is wrong in many textbooks. [6:40]