collision theory

• What must happen for particles to react?

  Particles must collide.
• Why can't particles react if they don't collide?

  Because they can't break chemical bonds without a collision.
• What must happen to chemical bonds for a reaction to occur?

  Chemical bonds must be broken.
• What is required to break chemical bonds?

  Breaking bonds requires energy.
• What is the term for the energy needed to break bonds during a collision?

  Activation energy.
• What happens if a collision doesn't have enough energy?

  It won't break bonds and will just bounce off each other.
• What is necessary for effective collisions between particles?

  Particles must collide in the correct orientation.
• How is the rate of reaction related to collisions?


  The rate of reaction is proportional to the number of effective collisions per second.
• What are the ways to increase the rate of reaction?

  • Increase concentration
  • Raise temperature
  • Increase surface area
  • Use a catalyst
• What effect does increasing concentration have on the rate of reaction?

  It increases the rate of reaction.
• How does temperature affect the rate of reaction?

  Increasing temperature increases the rate of reaction.
• What is the impact of surface area on the rate of reaction?

  Increasing surface area increases the rate of reaction.
• What role does a catalyst play in a chemical reaction?

  A catalyst increases the rate of reaction without being consumed.
• What type of reactant can have its surface area increased to affect the rate of reaction?

  Solid reactant.