Specific Heat, Heat of Fusion and Vaporization
Specifict heat and phase changes: Calculating how much heat is needed to convert 200g of ice at -10C to 110 degree steam.

Keq Intuition (mathy and not necessary to progress)
A probabilistic look at how molecules react to develop the intuition behind the equilibrium constant formula.

Keq derivation intuition (can skip; bit mathy)
A more concrete attempt at showing how the probabilities of molecules reacting is related to their concentration.

Exponential Decay Formula Proof (can skip, involves Calculus)
Showing that N(t)=Ne^(-kt) describes the amount of a radioactive substance we have at time T. For students with background in Calculus. Not necessary for intro chemistry class.

Work Done by Isothermic Process
Isothermic and Adiabatic processes. Calculating the work done by an isothermic process. Seeing that it is the same as the heat added.

Reconciling Thermodynamic and State Definitions of Entropy
Long video explaining why entropy is a measure of the number of states a system can take on (mathy, but mind-blowing).

More rigorous Gibbs Free Energy/ Spontaneity Relationship
More formal understanding of why a negative change in Gibbs Free Energy implies a spontaneous, irreversible reaction.

A look at a seductive but wrong Gibbs/Spontaneity Proof
A look at why the "proof" of the relation between changes in Gibbs Free Energy and Spontaneity is wrong in many textbooks.

Molecular and Empirical Forumlas from Percent Composition
Molecular and Empirical Forumlas from Percent Composition. Example 2.9 from Kotz Chemistry book

Change of State Example
Specific Heat Capacity and Enthalpy of Vaporization example

Chemistry

Source of these courses is khan
Videos on chemistry (roughly covering a first-year high school or college course).
khan
Website: http://www.dnatube.com/school/khan