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Endothermic
Takes in energy from surroundings so a decrease in surroundings temperature
Exothermic
Transfers energy to surroundings, increase of surroundings temperature
Examples of endothermic reactions
Thermal decomposition
Reaction of citric acid
Reaction of Sodium Hydrogencarbonate
Examples of exothermic reactions
Combustion
Many oxidation reactions
Neutralisation
Examples of everyday uses: endothermic
Some sports injury packs
Examples of everyday uses: exothermic
Self heating cans
Hand warmers