Rates of reaction and energy changes

    Cards (7)

    • What is the activation energy?
      The minimum energy required for a chemical reaction to occur
    • What is needed for a reaction to happen?
      • reactant particles must collide with each other
      • the collisions must have enough energy
    • What is the relation of concentration and pressure with rate of reaction?
      rate of reaction increases if the concentration of a dissolved reactant increases or if the pressure of a reacting gas increases
    • When does the SA:VOL ratio inc?
      when converting a solid into a powder as there is more particles to collide with, and the frequency of successful collisions increase
    • Why does the rate of reaction increase when pressure and concentration does too?
      • there are more particles in the same volume
      • the freq of more successful collisions increases
    • Why does temperature increase rate of reaction?
      • gains energy
      • particles move faster
      • freq of collisions increases
      • the energy of collision increases
    • What are the 4 things that can affect rate?
      • concentration
      • pressure
      • SA:V
      • temperature
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