effect of temp

• What does collision theory explain?

  It explains reaction rates based on particle 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 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 activation energy?

  The minimum energy needed for a reaction
• Why do some particles not collide successfully?

  They lack enough energy to overcome activation energy
• What happens when two high-energy particles collide?

  They can overcome activation energy and react
• What effect does increasing temperature have on particles?

  It increases their energy and speed
• How does increased temperature affect the frequency of collisions?

  It increases the frequency of collisions
• What is the relationship between temperature and the rate of reaction?

  The rate of reaction is proportional to temperature
• What are the key points about the effect of temperature on reaction rates?

  • Higher temperature increases particle energy
  • Faster-moving particles collide more frequently
  • More collisions have sufficient energy to react
  • Rate of reaction increases with temperature