reversible reactions

• • Le Chatelier's Principle states that if the conditions of a reaction are changes, the system will try to counteract that change
• the position of equilibrium is affected by:

  • temperature
  • pressure
  • concentration
• increasing temperature:

  • equilibrium shifts towards endothermic side of reaction
• decreasing temperature:

  • equilibrium shifts to exothermic side of reaction
• increasing pressure:

  • equilibrium shifts to side of reactions with smaller number of moles
• decreasing pressure:

  • equilibrium shift to side of reation with more moles
• • changing concentration will cause the system to no longer be at equilibrium
• increasing concentration:

  • increasing concentration of reactant, equilibrium shifts to right
  • so more products made
• decreasing concentration:

  • decreasing concentration of reactants, equilbrium shifts to left
  • less products made, more reactants made