IGCSE 11.5.6

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IGCSE 11.5.6

  1. 1. What is equilibrium?
  2. 2. What is equilibrium?If a reversible reaction is carried out in a closed containerso that the reactants and products cannot escape, a stateof dynamic equilibrium can be established.
  3. 3. What is equilibrium?If a reversible reaction is carried out in a closed containerso that the reactants and products cannot escape, a stateof dynamic equilibrium can be established. A + B C + D
  4. 4. What is equilibrium?If a reversible reaction is carried out in a closed containerso that the reactants and products cannot escape, a stateof dynamic equilibrium can be established. A + B C + DThis state is dynamic because both the forward and reversereactions are ongoing.
  5. 5. What is equilibrium?If a reversible reaction is carried out in a closed containerso that the reactants and products cannot escape, a stateof dynamic equilibrium can be established. A + B C + DThis state is dynamic because both the forward and reversereactions are ongoing.It is an equilibrium because: the rates of the forward and reverse reactions are the same the net concentrations of the components of the reaction mixture remain constant.
  6. 6. Dynamic equilibrium
  7. 7. Dynamic equilibriumThis graph illustrates the dynamic nature of equilibrium.It shows that both the forward and back reactions are takingplace: they both have non-zero rate. When their rates areequal, equilibrium is reached.
  8. 8. Dynamic equilibriumThis graph illustrates the dynamic nature of equilibrium.It shows that both the forward and back reactions are takingplace: they both have non-zero rate. When their rates areequal, equilibrium is reached. forward reaction: 2SO2(g) + O2(g)  2SO3(g) rate rates are equal at equilibrium reverse reaction: 2SO3(g)  2SO2(g) + O2(g) time

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