Equilibrium Notes 3

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Equilibrium : LeChatlier's Principle

Def of LeChatlier's Principle:

The system will never be able to get back to the original equilibrium position, no matter how hard it tries.

Stresses that change the equilibrium
(leave space for class notes)

There are 4 parts to answer: stress, how stress affect rxn, make more product or reactant, shift right(more product) or left(more reactant)

1. A change in concentration:
(What happens to the equilibrium constant: change or unchanged)

Stress: _______________________________________________________________

How stress affect rxn: _________________________________________________

Circle: Make more product or more reactant

Circle: Favoring: Forward rxn or Backward rxn

Circle: Shift Equilibrium to: Left(more product) or Right (more reactant)

2. A change in temperature(need to know if reaction is exo or endothermic):
(what happens to the equilibrium constant: change or unchanged)

Stress: _______________________________________________________________

How stress affect rxn: _________________________________________________

Circle: Make more product or more reactant

Circle: Favoring: Forward rxn or Backward rxn

Circle: Shift Equilibrium to: Left(more product) or Right (more reactant)

3. A change in pressure (for a homogeneous gas system):
(what happens to the equilibrium constant: change or unchanged)

Stress: _______________________________________________________________

How stress affect rxn: _________________________________________________

Circle: Make more product or more reactant

Circle: Favoring: Forward rxn or Backward rxn

Circle: Shift Equilibrium to: Left(more product) or Right (more reactant)

4. A change in catalysts:
(what happens to the equilibrium constant: change or unchanged)

Stress: _______________________________________________________________

How stress affect rxn: _________________________________________________

Circle: Make more product or more reactant

Circle: Favoring: Forward rxn or Backward rxn

Circle: Shift Equilibrium to: Left(more product) or Right (more reactant)