Rates of reaction + endothermic and exothermic 2.0 / 5 based on 1 rating ? ChemistryEnergy of reactions/Exothermic and endothermic reactionsGCSEAQA Created by: Pea_emmaCreated on: 04-04-13 11:28 The minimum amount of energy required to cause a reaction Activation energy 1 of 5 A substance that increases the rate of a chemical reaction without being changed itself Catalyst 2 of 5 A reaction that takes in heat from its surroundings Endothermic 3 of 5 A reaction that gives out heat to its surroundings Exothermic 4 of 5 The ability to do work; measured in joules (J) Energy 5 of 5
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