Chemistry: Year 10 Term 2: Reaction Profiles 0.0 / 5 ? ChemistryEnergy of reactions/Exothermic and endothermic reactionsGCSEAQA Created by: Charlotte HerondaleCreated on: 25-11-18 13:35 What is a reaction profile? (2) Diagram showing energy change in reactants/products 1 of 12 The line to the left shows what? (1) Reactants 2 of 12 The top of the peak indicates what? (1) Activation energy 3 of 12 The curve indicates what? (2) Energy release/absorption 4 of 12 The product line lower than the reactant line means what? (2) Energy released - exothermic 5 of 12 The reactant line higher than the reactant line means what? (2) Energy absorbed - endothermic 6 of 12 Energy change is what? (1) Difference between energy levels of reactant/product 7 of 12 What is energy change measured in? (1) kJ/mol 8 of 12 Define 'activation energy' (2) The minimum energy needed for the reaction to occur 9 of 12 What happens if atoms collide at less than the activation energy? (1) They bounce off of each other 10 of 12 Breaking chemical bonds does what to energy and what process is this? (2) Requires energy, endothermic 11 of 12 Making chemical bonds does what to energy and what process is this? (2) Releases energy, exothermic 12 of 12
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