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Factors affecting chemical
       equilibrium.
   Sunday, 04 March 2012
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
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.
CONCENTRATION EFFECT
A   + B          C


 ADD MORE



             ADD MORE
CONCENTRATION EFFECT
A   + B          C


 REMOVE



              REMOVE
TEMPERATURE EFFECT
A   + B      C + (HEAT)


ADD HEAT

              REDUCE HEAT


EXOTHERMIC

             ENDOTHERMIC
PRESSURE EFFECT
 A(g) + B(g)                   C(g)

2 gas molecules          1 gas molecule


ADD PRESSURE

                      REDUCE PRESSURE



       ONLY APPLIES TO GASES

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Factors affecting chemical equlibrium

  • 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