Chemistry: Year 10 Term 2: Exothermic/Endothermic Reactions 0.0 / 5 ? ChemistryEnergy of reactions/Exothermic and endothermic reactionsGCSEAQA Created by: Charlotte HerondaleCreated on: 25-11-18 10:41 What always occurs in a reaction? (2) Energy is transferred and bonds are made/broken 1 of 9 What stays the same before and after the reaction? (2) Total energy (1st law thermodynamics) 2 of 9 Define 'exothermic', what happens to the surroundings? (2) Releases energy to the surroundings / surroundings heat up 3 of 9 Define 'endothermic', what happens to the surroundings? (2) Absorbs energy from the surroundings / surroundings cool down 4 of 9 Name 2 exothermic reactions (2) Combustion, neutralisation 5 of 9 Name 2 endothermic reactions (2) Thermal decomposition, sherbet dissolving 6 of 9 What is the difference between the energy content of the reactants/products of exothermic reactions? (1) Reactants have lower energy content 7 of 9 What is the difference between the energy content of the reactants/products of endothermic reactions? (1) Reactants have higher energy content 8 of 9 Differences in energy are calculated in what unit? (1) kJ/mol 9 of 9
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