chem exothermic and endothermic

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What are exothermic reactions?

Reactions that transfer energy to the surroundings, usually by heating. They are shown by a rise in temperture.

Examples of exothermic reactions

combustion

neuralisation reactions

examples of everyday uses that use exothermic reactions

handwarmers

self heating cans

what is a endothermic reaction

one which takes in energy from the surroundings which is shown by a fall in temperature.

examples of endothermic reactions

The reaction between of citric acid and sodium hydrogencarbonate

thermal decompositons

everyday uses of endothermic reactions

sports injury packs

what is a reaction profile ?

They are diagrams that show the relative energies of the reactants and products in a reaction and how the energy changes over the coarse of the reaction.

what is activation energy ?

The initial rise representing the energy needed to start the reaction