• Dynamic equilibrium
• Conditions necessary to establish equilibrium
• Homogenous equilibrium
• Hetrogeneous equilibrium

The Equilibrium Constant Expression

• Law of Chemical Equilibrium
• Equilibrium constant, $K_{eq}$
• Equilibrium constant expression
• What do values for $K_{eq}$ mean?

Spontaneity of Reactions

• Spontaneous (favourable) reactions
• Exothermic reactions
• Entropy $\triangle S$
• Second law of thermodynamics
• Gibbs Free Energy

• When a chemical system at equilibrium is changing at the molecular level, its macroscopic properties are constant, the system is said to have dynamic equilibrium
• In a chemical system at equilibrium, there is a constant ratio bewteen the concentrations of the products and the concentrations of the reactants, this ratio is the equilibrium constant, $K_{eq}$