This video explains the concepts from your packet on Chapter 19 (Chemical Thermodynamics), which can be found here: https://goo.gl/jKBCnx Section 19.1: Spontaneous Processes Section 19.2: Entropy and the Second Law of Thermodynamics Section 19.3: Molecular Interpretation of Entropy Section 19.4: Entropy Changes in Chemical Reactions Section 19.5: Gibbs Free Energy Section 19.6: Free Energy and Temperature Section 19.7: Free Energy and the Equilibrium Constant