3.2.3 Chemical Equilibrium

Question 1

What does dynamic equilibrium mean?

Answer 1

It occurs when the rate of forward reaction equals the rate of backwards reaction and the concern traction of the reactants and products remains constant in a closed system

Question 2

Changing what factors can alter the position of equilibrium?

Answer 2

-concentration of reactants or products
-pressure
-temperature

Question 3

Explain the Le Chatelier’s principle

Answer 3

If a system at equilibrium is disturbed the equilibrium moves in the direction that tends to reduce the disturbance

Question 4

What effect does a catalyst have on the position of equilibrium?

Answer 4

No effect

Question 5

What type of system is Kc relevant for?

Answer 5

Homogeneous systems in equilibrium

Question 6

What does Kc being greater or less than 1 suggest for the position of equilibrium?

Answer 6

Greater than 1= over to the right
Less than 1 = over to the left

Question 7

What effect does decreasing the temperature of an endothermic reaction have on Kc?

Answer 7

Kc decreases

Question 8

What effect does increasing the temperature of an endothermic reaction have on Kc?

Answer 8

Kc increases

Question 9

What effect does decreasing the temperature of an exothermic reaction have on Kc?

Answer 9

Kc increases

Question 10

What effect does increasing the temperature of an exothermic reaction have on Kc?

Answer 10

Kc decreases