Exothermic reaction

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An exothermic reaction is a reaction where the substances (things) reacting (reactants) release energy in the form of heat. an example of this is combustion. Exothermic reactions Exothermic reactions transfer energy to the surrounding. (E.g. burning) Reversible reactions are where the products can react to remake the original reactants. If the forward reaction is exothermic, the reverse reaction is endothermic. The energy is usually transferred as heat energy, causing the reaction mixture and its surroundings to become hotter. The temperature increase can be detected using a thermometer. Some examples of exothermic reactions are: -burning -neutralisation reactions between acids and alkalis -the reaction between water and calcium oxide

Endothermic reactions Endothermic reactions take in energy from the surroundings. (E.g. electrolysis) Reversible reactions are where the products can react to remake the original reactants. If the forward reaction is exothermic, the reverse reaction is endothermic. The energy is usually transferred as heat energy, causing the reaction mixture and its surroundings to get colder. The temperature decrease can also be detected using a thermometer. Some examples of endothermic reactions are: Endothermic reactions take in energy from the surroundings. (E.g. electrolysis) -electrolysis -the reaction between ethanoic acid and sodium carbonate -the thermal decomposition of calcium carbonate in a blast furnace