Factors Affecting the Rate of Reaction

• What are the factors that affect the rate of chemical reactions?

  Temperature, concentration, pressure, surface area, presence of catalyst
• What is the theory behind chemical reactions called?

  Collision theory
• What must particles do to react according to collision theory?

  Collide with sufficient energy
• What is activation energy?

  The minimum energy required for a reaction
• What happens if particles collide with less energy than the activation energy?

  They bounce apart without reacting
• What two main factors determine the rate of a chemical reaction?

  Energy of particles and collision frequency
• How does increasing the energy of particles affect the rate of reaction?

  It increases the likelihood of surpassing activation energy
• How does the frequency of collisions affect the rate of reaction?

  More frequent collisions lead to more successful reactions
• What happens to the rate of reaction as temperature increases?

  It increases due to faster particle movement
• How do concentration and pressure affect the rate of reaction?

  They increase the number of particles per volume
• Why does a higher surface area increase the rate of reaction?

  It allows more collisions with reactants
• What is the role of a catalyst in a chemical reaction?

  It speeds up the reaction without being consumed
• How does a catalyst affect activation energy?

  It lowers the activation energy required
• What is a common source of catalysts?

  Transition metals like cobalt and nickel
• What are the four main factors affecting the rate of chemical reactions?

  • Temperature
  • Concentration
  • Pressure
  • Surface area
  • Presence of a catalyst
• What are the key concepts of collision theory?

  • Particles must collide to react
  • Collisions must have sufficient energy (activation energy)
  • More energy and frequent collisions increase reaction rate
• How do temperature, concentration, pressure, and surface area affect reaction rates?

  • Increase energy of particles
  • Increase frequency of collisions
  • Result in more successful collisions
• What is the effect of catalysts on chemical reactions?

  • Speed up reactions
  • Lower activation energy
  • Provide alternative reaction pathways