reversible reaction

• What is meant by a reversible reaction?

  A reversible reaction is one where the products can react to reform the original reactants.
• What is equilibrium in the context of reversible reactions?

  Equilibrium is the point where the forward and reverse reactions occur at the same rate.
• What happens to the energy in a forward reaction of a reversible reaction?

  Energy is absorbed in an endothermic forward reaction.
• What happens to the energy in the reverse reaction of a reversible reaction?

  Energy is released in an exothermic reverse reaction.
• What is the color of hydrated copper sulfate?

  Hydrated copper sulfate is blue.
• What happens when hydrated copper sulfate is heated?

  It reacts to form anhydrous copper sulfate and water.
• What is the color of anhydrous copper sulfate?

  Anhydrous copper sulfate is white.
• What is the relationship between endothermic and exothermic reactions in reversible reactions?

  If a reversible reaction is exothermic in one direction, it is endothermic in the opposite direction.
• What are the energy changes in the reaction of hydrated copper sulfate?

  • Heating hydrated copper sulfate: endothermic (energy absorbed)
  • Cooling anhydrous copper sulfate with water: exothermic (energy released)
• What happens in a sealed container during a reversible reaction?

  The forward and reverse reactions will take place at exactly the same rate at equilibrium.
• What is the definition of equilibrium in reversible reactions?

  Equilibrium is when the rates of the forward and reverse reactions are equal.
• What are the key facts about energy changes in reversible reactions?

  • Exothermic in one direction = endothermic in the opposite direction
  • Same amount of energy is transferred in each case