Summary sor v3
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Collision theory states that for a chemical reaction to occur, reactant particles must collide with sufficient energy. Reactions proceed faster when collisions are more frequent, either because particles are closer together due to higher concentration or pressure, or because particles have higher energy when they collide at higher temperatures. The speed of a reaction also increases with factors that increase the frequency or effectiveness of collisions between reactants.
Summary sor v3
- 1. Summary
- 2. Collision Theory • Reaction takes place when particles collide. Effective Collision • Particles must collide with sufficient energy for reactions to occur
- 3. Collision Theory • More frequent collisions => Faster reaction • Particles have higher energy => Faster reaction
- 4. Factors Affecting Speed of Reaction 1) Concentration High concentration • Particles are closer together • Hence, they collide more frequently • Faster reaction
- 5. Factors Affecting Speed of Reaction 2) Pressure Pressure is increased • Particles are squeezed closer together • Hence, they collide more frequently • Faster Reaction
- 6. Factors Affecting Speed of Reaction 3) Temperature Temperature is increased • Particles have higher energy when they collide • Move faster and hence collide more frequently • Faster Reaction
- 7. Next Lesson • How particle size affect speed of reaction? • Measuring speed of reaction