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Temperature & Concentration



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CIE-IGCSE-Chemistry-7-RN

Temperature & Concentration

Temperature

•  Particles need to have at least a minimum amount of energy to react when they collide

•  This is called the activation energy

•  At low temperatures only a small number of particles will have enough activation energy 

so the reaction will be slow

•  At higher temperatures the particles have more kinetic energy so they move faster and 

with more energy

•  The collisions are thus more energetic and there is a greater number of particles with 

sufficient energy to react, so the rate of reaction increases



7 CHEMICAL REACTIONS

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