Chemistry Energy changes In Reactions

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Exothermic reactions transfere energy to the surrondings.Endothermic reactions take in energy from the surrondings. Bond making and bond breaking provides ther energy change for endo and exothermic reactions

Exothermic reactions

These are reactions that transfere energy to the surrondings which is normally heat, this causes the reaction and its surrondings to get warmer, the increase in tempreture can be detected by using a thermometer. 

Endothermic reactions 

These are reactions that take in energy from the surrondings.The energy is usually ransfered as heat energy which causes the reaction and the surrondings to get colder and this decrease in tempreture

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