Reaction rates

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Last updated 5:33 PM on 5/28/26
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5 Terms

1
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What is rate of reaction

A measure of how fast a reactant is formed or used up with a formula of

Δquantity​/Δt

2
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What factors affect ROR

  • Higher conc. higher ROR as particles are closer together so more frequent successful collisions

  • Higher SA of solid means more particles exposed at surface that can be collided with

  • Higher pressures faster ROR as they are closer

  • Higher temps higher ROR greater proportion of particles with energy so move faster and collide more

  • Catalysts provide an alternative pathway with lower activation energy

3
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What is activation energy

Minimum energy that reacting particles must have for a successful collision and reaction to occur

4
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How can ROR be measured

  • Monitoring removal of reactant or formation of product

  • Monitoring volume of gas produced at time intervals

  • Monitoring loss of mass of reactants using a balance

5
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What is a successful collision

One in which particles collide with correct orientation and have sufficient energy to overcome the activation energy barrier of reaction