Equilibrium Constants and Reaction Dynamics

The video tutorial explains how temperature changes affect equilibrium systems, focusing on the equilibrium constant's variation with temperature. It distinguishes between endothermic and exothermic reactions, treating heat as a reactant or product. Le Chatelier's Principle is used to predict reaction shifts due to temperature changes. The role of catalysts is also discussed, noting that they do not alter the equilibrium composition but speed up reaching equilibrium. The tutorial concludes with a summary of key points and predictions for reaction shifts.

What is the effect of changing the temperature on the equilibrium constant of a system?

• It remains unchanged.

• It depends on the reaction type.

• It always increases.

• It always decreases.

In an endothermic reaction, how is heat treated?

• As a catalyst

• As a byproduct

• As a reactant

• As a product

In an exothermic reaction, how is heat treated?

• As a product

• As a reactant

• As a byproduct

• As a catalyst

How does an increase in temperature affect an exothermic reaction?

• Has no effect

• Increases the equilibrium constant

• Shifts the reaction to the right

• Shifts the reaction to the left

What happens to the equilibrium constant when temperature is increased in an exothermic reaction?

• It increases.

• It decreases.

• It remains constant.

• It becomes zero.

What is the role of a catalyst in a system at equilibrium?

• It decreases the reaction rate.

• It speeds up reaching equilibrium.

• It shifts the equilibrium position.

• It changes the equilibrium constant.

What happens to the equilibrium constant when the reactant concentration is increased?

• It decreases.

• It increases.

• It becomes zero.

• It remains constant.

How does increasing pressure affect a system at equilibrium?

• Increases the equilibrium constant

• Shifts towards fewer moles of gas

• Shifts towards more moles of gas

• Decreases the equilibrium constant

What is the effect of increasing temperature on an endothermic reaction?

• Has no effect

• Shifts the reaction to the right

• Decreases the equilibrium constant

• Shifts the reaction to the left

What principle explains the shift in reaction direction due to changes in concentration or temperature?

• Le Chatelier's Principle

• Dalton's Law

• Boyle's Law

• Avogadro's Law