Big Idea 6. Equilibrium represents a balance between enthalpy and entropy for reversible physical and chemical changes.

Section 15.1: The Concept of Equilibrium

o Explain what is meant by chemical equilibrium and how it relates to reaction rates.

Section 15.2: The Equilibrium Constant

o Write the equilibrium constant expression for any reaction.

o Convert K_c to K_p and vice versa.

Section 15.3: Understanding and Working with Equilibrium

Constants

o Relate the magnitude of an equilibrium constant to the relative amounts of reactants and products present in an equilibrium mixture.

o Manipulate the equilibrium constant to reflect changes in the chemical equation.

Section 15.4: Heterogeneous Equilibria

o Write the equilibrium constant expression for a heterogeneous reaction.

Section 15.5: Calculating Equilibrium Constants

o Calculate an equilibrium constant from concentration measurements.

Section 15.6: Applications of Equilibrium Constants

o Predict the direction of a reaction given the equilibrium constant and the concentrations of reactants and products.

o Calculate equilibrium concentrations given the equilibrium constant and all but one equilibrium concentration.

o Calculate equilibrium concentrations, given the equilibrium constant and the starting concentrations.

Section 15.7: Le Chatelier’s Principle

o Use Le Chatelier’s principle to predict how changing the concentrations, volume, or temperature of a system at equilibrium affects the equilibrium position.