Kinetics, Energetics & Equilibria

Question 1

What is Le Chatelier’s Principle?

Answer 1

If a system at equilibrium is disturbed, it will shift in a direction that opposes the change to restore equilibrium.

Question 2

How does temperature affect equilibrium?

Answer 2

Increase temp → shifts in endothermic direction
Decrease temp → shifts in exothermic direction.

Question 3

How does pressure affect equilibrium?

Answer 3

Increase pressure → shifts to side with fewer gas molecules
Decrease pressure → shifts to side with more gas molecules.

Question 4

How does concentration affect equilibrium?

Answer 4

Add more reactant → shifts right (makes more product)
Add more product → shifts left (makes more reactant)
Remove something → shifts to replace what was removed.

Question 5

What effect does a catalyst have on equilibrium?

Answer 5

No effect on position of equilibrium — just reaches it faster.