Energy Changes 0.0 / 5 ? ChemistryEnergy transfer during exothermic and endothermic reactions, Reaction profiles and The energy change of reactionGCSEAQA Created by: holly.preston12345Created on: 20-12-18 13:38 Energy transfer during exothermic and endothermic reactions Energy transfer during exothermic and endothermic reactions 1 of 14 What happens in an endothermic reaction? Energy is taken in from the surroundings so the temperature of the surroundings decreases 2 of 14 Endothermic reactions include: Thermal decomposition, Sports injury packs 3 of 14 What happens in an exothermic reaction? Energy is transferred to the surroundings so the temperature of the surroundings increases 4 of 14 Exothermic reactions include: Combustion, Hand warmers, Neutralisation 5 of 14 Reaction profiles Reaction profiles 6 of 14 What do reaction profiles show? Overall energy change of a reaction 7 of 14 When do chemical reactions only happen? When particles collide with sufficient energy 8 of 14 What is the activation energy? Energy needed for a reaction to occur 9 of 14 The energy change of reactions The energy change of reactions 10 of 14 Breaking bonds in a reactions is a... Endothermic process 11 of 14 Making bonds in products... Exothermic process 12 of 14 In a exothermic reaction regarding the overall energy change of a reaction what happens? Energy released making new bonds is greater than the energy taken in breaking existing bonds 13 of 14 In a endothermic reaction regarding the overall energy change of a reaction what happens? Energy needed to break existing bonds is greater than the energy released making new bonds 14 of 14
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