Factors affecting chemical equlibrium

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  • 1. Factors affecting chemical equilibrium. Sunday, 04 March 2012
  • 2. DYNAMIC EQUILBRIUM A + B CWhen substances A and B are mixedthey react to form a substance Cuntil a stable fixed concentration ofthe three substance exists.At that stage the reactions continuebut the concentrations do not changeunless the conditions change
  • 3. In the following slides the effects of changing the concentration, temperature and pressure (gases only) are shown – the red andblue arrows show which way theequilibrium moves as a change is put into effect.
  • 4. CONCENTRATION EFFECTA + B C ADD MORE ADD MORE
  • 5. CONCENTRATION EFFECTA + B C REMOVE REMOVE
  • 6. TEMPERATURE EFFECTA + B C + (HEAT)ADD HEAT REDUCE HEATEXOTHERMIC ENDOTHERMIC
  • 7. PRESSURE EFFECT A(g) + B(g) C(g)2 gas molecules 1 gas moleculeADD PRESSURE REDUCE PRESSURE ONLY APPLIES TO GASES