Factors Affecting Rates of Reaction

• What are the four factors affecting rates of reaction?

  Temperature, concentration, surface area, catalyst
• How does temperature affect the rate of reaction?

  Higher temperature increases particle movement speed
• What happens to particles when temperature is increased?

  Particles move faster and collide more often
• Why does increasing concentration affect reaction rates?

  More particles lead to more frequent collisions
• How does surface area influence reaction rates?

  Larger surface area increases the number of collisions
• What is the role of a catalyst in a reaction?

  A catalyst speeds up the reaction without being consumed
• How do more collisions affect the rate of reaction?

  More collisions increase the likelihood of successful reactions
• What happens to the rate of reaction when temperature is decreased?

  The rate of reaction decreases due to slower particles
• How does increasing the surface area of a solid reactant affect reaction rates?

  It increases the surface area to volume ratio
• What is the effect of increasing pressure on gas reactions?

  It increases the rate of reaction by reducing volume
• Why do smaller pieces of solid reactants increase reaction rates?

  They provide more surface area for collisions
• If a solid is broken into smaller pieces, what happens to its reaction rate?

  The reaction rate increases due to more collisions
• How does the presence of a catalyst change the energy of activation?

  A catalyst lowers the energy of activation needed
• What is the relationship between temperature and particle energy?

  Higher temperature means higher particle energy
• How does increasing the concentration of a solution affect particle collisions?

  It increases the number of particles available to collide
• What is the effect of increasing the surface area of a solid reactant on the reaction rate?

  It increases the reaction rate by enhancing collisions
• How does increasing the number of successful collisions affect the rate of reaction?

  It increases the rate of reaction significantly
• What happens to the rate of reaction when a catalyst is added?

  The rate of reaction increases
• Why does breaking a solid into smaller pieces increase its reaction rate?

  It increases the surface area available for reactions
• If the concentration of a solution is decreased, what happens to the reaction rate?

  The reaction rate decreases due to fewer particles
• How does the size of solid lumps affect the rate of reaction?

  Smaller lumps increase the rate of reaction
• What is the effect of increasing the temperature on particle movement?

  Particles move faster with increased temperature
• How does increasing the pressure of a gas affect its reaction rate?

  It increases the reaction rate by reducing volume
• What happens to the rate of reaction if the surface area of a solid is increased?

  The rate of reaction increases due to more collisions
• How does the presence of more particles in a reaction mixture affect the likelihood of collisions?

  It increases the likelihood of successful collisions
• What is the effect of a catalyst on the energy barrier of a reaction?

  A catalyst lowers the energy barrier
• Why do reactions occur faster at higher temperatures?

  Particles have more energy and collide more frequently
• If the concentration of a reactant is increased, what is the expected effect on the reaction rate?

  The reaction rate is expected to increase
• How does the size of particles in a solid reactant influence the reaction rate?

  Smaller particles increase the reaction rate
• What is the relationship between surface area and reaction rate?

  Increased surface area leads to increased reaction rate
• How does increasing the number of collisions affect the rate of reaction?

  It increases the rate of reaction
• If a catalyst is removed from a reaction, what happens to the reaction rate?

  The reaction rate decreases without the catalyst
• How does the concentration of reactants affect the frequency of collisions?

  Higher concentration increases collision frequency
• What is the effect of temperature on the energy of particles?

  Higher temperature increases particle energy
• Why does increasing the surface area of a solid reactant enhance reaction rates?

  It allows more particles to collide simultaneously
• If the pressure of a gas is increased, what is the expected effect on the reaction rate?

  The reaction rate is expected to increase
• How does the presence of a catalyst affect the activation energy of a reaction?

  A catalyst lowers the activation energy required
• What happens to the rate of reaction when the concentration of reactants is decreased?

  The rate of reaction decreases
• How does increasing the temperature affect the speed of particles in a reaction?

  It increases the speed of particles
• If the surface area of a solid is decreased, what happens to the reaction rate?

  The reaction rate decreases due to fewer collisions