Chemistry C2 GCSE AQA - UNIT 5 Follow on to unit 1, 2, 3 and 4 1.0 / 5 based on 1 rating ? ChemistryGCSEAll boards Created by: OneTooManyAnOpinionCreated on: 23-05-12 17:47 Exothermic and Endothermic reactions Endothermic = transfer of energy TO the surroundings and often HEATS up surroundings, e.g. combustion Endothermic = take IN energy from surroundings. Some cause DECREASE in temperature, e.g. photosynthesis 1 of 2 Energy and Reversible Reactions A reversible reaction that is exothermic in one direction MUST be endothermic in the other direction The amount of energy given out by the exothermic reaction is EQUAL to the amount taken in by the endothermic reaction Changing the temperature in a CLOSED SYSTEM, changes the amount of reactants and products Endothermic = INCREASES in products when temperature is HIGH Exothermic = INCREASES in products when temperature is LOW 2 of 2
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