C2 Chapter 4 3.0 / 5 based on 2 ratings ? ChemistryGCSEAQA Created by: Ronan VineCreated on: 13-01-13 14:33 What is activation energy? Activation energy is the least amount of energy needed before a reaction can take place 1 of 5 Exothermic reactions are... Reactions that transfer heat from the reacting substances to the surroundings 2 of 5 Endothermic reactions are... Reactions that transfer heat from the surroundings to the reacting substances 3 of 5 A catalyst... Speeds up the rate of reaction without being used up in the reaction 4 of 5 What are the 4 main factors affecting rate of reaction? Temperature, Surface Area, Concentation/Pressure and Presence of a Catalyst 5 of 5
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