8.2 Collision theory and surface area
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What are factors that affect the rate of chemical reactions
• temperature • surface area of solids • concentration of solutions/pressure of gases • presence of catalyst
What is collision theory
where particles collide with sufficient energy for a reaction to take place
What is activation energy
minimum amount of energy that particles need to react
What causes reactions to be more likely to occur
• increase frequency of particles colliding with each other • increase energy they have when they collide
why does surface area increase rate of reaction
• more particles of solid are exposed and able to react • increases frequency of collisions between reacting particles • reaction can take quicker