Shifts in Equilibrium: Analyzing Temperature Effects in Chemical Reactions

The video explains Le Chatelier's Principle, focusing on how temperature changes affect equilibrium in exothermic and endothermic reactions. It discusses the role of reaction quotient (Q) and equilibrium constant (K) in determining the direction of the net reaction. The video also covers the impact of catalysts on reaction rates and equilibrium, emphasizing that catalysts speed up reactions without altering the equilibrium composition.

What happens to the equilibrium position of an exothermic reaction when the temperature is increased?

• It shifts to the left.

• It shifts to the right.

• It remains unchanged.

• It depends on the pressure.

In the context of Le Chatelier's Principle, how is heat treated in an exothermic reaction?

• As a reactant

• As a product

• As a catalyst

• As an inhibitor

What is the relationship between Qc and Kc when a reaction is at equilibrium?

• Qc is unrelated to Kc

• Qc is less than Kc

• Qc is greater than Kc

• Qc is equal to Kc

How does an increase in temperature generally affect the equilibrium constant (Kc) for an exothermic reaction?

• Kc remains the same

• Kc decreases

• Kc increases

• Kc becomes zero

In an endothermic reaction, what effect does increasing the temperature have on the equilibrium position?

• Shifts to the left

• Shifts to the right

• Remains unchanged

• Depends on the catalyst

What color change is observed when the temperature is increased in the cobalt complex ion reaction?

• Blue to violet

• Pink to blue

• Blue to pink

• Pink to violet

How does a catalyst affect the rate of reaching equilibrium in a reaction?

• It slows down the reaction.

• It speeds up the reaction.

• It has no effect on the reaction rate.

• It changes the equilibrium position.

Does the addition of a catalyst change the equilibrium composition of a reaction?

• Yes, but only in exothermic reactions.

• Yes, but only in endothermic reactions.

• No, it does not change the composition.

• Yes, it changes the composition.

What is the primary role of a catalyst in a chemical reaction?

• To increase the temperature

• To change the equilibrium constant

• To increase the yield of products

• To decrease the activation energy

In the context of reaction rates, what does a catalyst do to both the forward and reverse reactions?

• Slows down both reactions

• Speeds up both reactions equally

• Speeds up only the reverse reaction

• Speeds up only the forward reaction