Le Chaltelier's Principle

Le Chaltelier's Principle states that if a chemical system at equilibrium is stressed

• the system will not adjust

• the system will adjust to increase the stress

• the system will adjust to reduce the stress

2SO2(g)+O2(g) ⇌ 2SO3(g) + Heat

Adding SO2(g) will

• have no change

• increase rate of reaction

• shift equilibrium left

• shift equilibrium right

  
  

2SO2(g)+O2(g) ⇌ 2SO3(g) + Heat

Increasing the temperature will...

• have no change

• increase pressure

• shift equilibrium left

• shift equilibrium right

For the reaction...

N2  +  O2  <=>  2NO

If  O2 is removed, the  concentration of N2 will _______.

• double

• increase

• remain the same

• decrease

Around what time does the reaction reach equilibrium?

• 80 min

• 25 min

• 45 min

• 70 min

Which of the two graphs reaches equilibrium?

• The right

• Neither

• The left

• Both

1N2 + 3H2 →2NH3

When the pressure on the system is increased, the equilibrium position shifts to the right. Why?

• Keq will increase when it is shifted to the right

• To increase the amount of products

• To reduce the pressure, as the right side has fewer molecules of gas

• To increase the pressure, as the right side has more molecules of gas