Equilibrium Constant and Expressions

The video tutorial explains dynamic equilibrium using the Golden Gate Bridge as an analogy, highlighting the constant flow of cars as a representation of equilibrium. It then delves into chemical reactions, distinguishing between homogeneous and heterogeneous reactions. The concept of dynamic equilibrium is further illustrated through the evaporation and condensation of water in a closed flask. The tutorial also covers the equilibrium constant, explaining how to calculate it and its significance in chemical reactions. Finally, it differentiates between homogeneous and heterogeneous equilibrium, emphasizing the role of gases and the treatment of liquids and solids in these reactions.

What does the Golden Gate Bridge analogy illustrate in terms of equilibrium?

• Static equilibrium

• Dynamic equilibrium

• Thermal equilibrium

• Chemical equilibrium

In a chemical reaction, what is the term for reactions where all reactants and products are in the same phase?

• Homogeneous reactions

• Heterogeneous reactions

• Exothermic reactions

• Endothermic reactions

What happens to the water level in a corked flask over time?

• It continuously drops

• It rises

• It remains constant after initial drop

• It evaporates completely

What does the equilibrium constant depend on?

• Volume and mass

• Temperature and pressure

• Shape and size

• Color and texture

How is the equilibrium constant expression written for a reaction?

• Product of reactants' concentrations

• Sum of reactants' concentrations

• Ratio of products' to reactants' concentrations

• Difference between products' and reactants' concentrations

In the equilibrium constant expression, what happens to the concentration of solids and liquids?

• They are doubled

• They are replaced with one

• They are ignored

• They are included as is

What is the equilibrium constant expression for the reaction 2S2 + O2 → 2SO3?

• [SO3] / ([S2] * [O2]^2)

• [SO3]^2 / ([S2]^2 * [O2])

• [S2]^2 / ([SO3]^2 * [O2])

• [O2] / ([SO3]^2 * [S2]^2)

What is the equilibrium constant value if the concentrations are [SO3] = 3.50, [S2] = 1.50, and [O2] = 1.25?

• 2.36

• 4.36

• 3.36

• 5.36

In heterogeneous equilibrium, how are solids treated in the equilibrium expression?

• As their molar mass

• As one

• As zero

• As their density

What is the equilibrium expression for a reaction involving only gases?

• Include gases and liquids

• Include only gases

• Include all phases

• Include gases and solids