Rates of reaction

• What needs to happen for a reaction to occur ?

  Particles must collide.

  Particles must have activation energy.

  Particles must collide with the correct orientation.
• What is activation energy?

  The minimum amount of energy needed to break bonds and start a reaction
• Which 5 factors affect the rate of reaction?

  1. Temperature 2. Concentration of reactants 3. Surface area 4. Catalysts 5. Pressure (for gases)
• How does increased temperature affect the rate of reaction?

  Increases the kinetic energy of the particles so there are more collisions which increases the rate of reactio.
• How does an increased concentration affect the rate of reactio?

  More particles so more collisions which increases the rate of reaction of aqueous solutions
• How does an increase in surface area affect the rate of reaction?

  More exposure to particles so more collisions and a faster rate of reaction
• how does increased pressure affect the rate of reaction?

  Pushes particles closer together so kore frequent collisions which increase the rate of reaction
• How does a catalyst affect the rate of reaction

  A catalyst provides an alternate reaction pathway of lower activation energy so increases the rate of reaction