1. Factors affecting chemical
equilibrium.
Sunday, 04 March 2012

2. DYNAMIC EQUILBRIUM
A + B C
When substances A and B are mixed
they react to form a substance C
until a stable fixed concentration of
the three substance exists.
At that stage the reactions continue
but the concentrations do not change
unless the conditions change

3. In the following slides the effects
of changing the concentration,
temperature and pressure (gases
only) are shown – the red and
blue arrows show which way the
equilibrium moves as a change is
put into effect.

4. CONCENTRATION EFFECT
A + B C
ADD MORE
ADD MORE

5. CONCENTRATION EFFECT
A + B C
REMOVE
REMOVE

6. TEMPERATURE EFFECT
A + B C + (HEAT)
ADD HEAT
REDUCE HEAT
EXOTHERMIC
ENDOTHERMIC

7. PRESSURE EFFECT
A(g) + B(g) C(g)
2 gas molecules 1 gas molecule
ADD PRESSURE
REDUCE PRESSURE
ONLY APPLIES TO GASES