Effect of Temperature on Rate

• What does collision theory explain?

  It explains reaction rates based on collisions
• What must happen for a chemical reaction to take place according to collision theory?

  Reacting particles must collide with each other
• What is required for collisions to be successful?

  Collisions must have sufficient energy
• How is the rate of a reaction determined?

  By the frequency of successful collisions
• What does the energy profile of a reaction indicate if the product has less energy than the reactants?

  The reaction is exothermic
• What is the term for the minimum energy required for particles to react?

  Activation energy
• What happens to the energy of particles during a reaction?

  Some particles have more energy than others
• What happens when two low-energy particles collide?

  They cannot overcome the activation energy barrier
• What occurs when two high-energy particles collide?

  They can overcome the activation energy barrier
• How does increasing temperature affect particle energy?

  It increases the energy of the particles
• What is the effect of increased temperature on the frequency of collisions?

  It increases the frequency of collisions
• What does a higher temperature allow more particles to do?

  Overcome the activation energy barrier
• How is the rate of reaction related to temperature?

  The rate of reaction is proportional to temperature