6.4 - The effect of changing conditions on equilibrium

Question 1

Summary of conditions changing and the effect of it on the equilibrium and impact on Kc:

Answer 1

Question 2

Effect of the catalyst on Kc and equilibrium?

Answer 2

Catalysts increase the rate of both the forward and reverse reactions, reducing the time needed to reach equilibrium following a change.

However, catalysts neither alter the equilibrium position nor the value of Kc.

Question 3

What doesn’t affect the Kc

Answer 3

While shifts in concentration or pressure can move the equilibrium position, altering the quantities present to counteract the change, Kc remains unchanged at a specific temperature.

Question 4

how does temperature change affect Kc?

Answer 4

• A decrease in the amount of product at equilibrium causes Kcto decrease.
• An increase in the amount of product at equilibrium causes Kcto increase.

This ensures that the value of Kc aligns with the new position of equilibrium.

Question 5

What happens if the temperature is increased/decreased?

Answer 5

For an exothermic reaction, increasing temperature shifts the equilibrium towards the reactants (left).
For an endothermic reaction, increasing temperature shifts the equilibrium towards the products (right).