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Dynamic Equilibrium

Closed system

  • Where no matter can leave or enter but energy can be transferred

Equilibrium

  • A state where opposing forces/processes are balanced
    • Mechanical - seesaw balanced
    • Thermal - two objects at different temperatures that eventually reach the same temp in contact

Chemical Equilibrium

  • Occurs when the forward reaction rate equals the backward reaction rate
  • At equilibrium, the amount of reactants and products will remain constant

Dynamic Equilibrium

  • The forward and backward reactions continue to occur, this is dynamic equilibrium
  • At a molecular level, reactions are continuously happened, the system is balanced
  • No overall change in amount of reactants and products, even though both reactions are ongoing

  • Dynamic equilibrium can only occur in a closed system
  • If reactants/products leave the system, equilibrium cannot be maintained
    • Continuous addition/removal of substances disrupts balance
    • Prevents system of reaching the state where reaction rates are equal