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Endothermic/Exothermic Reactions
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Endothermic/Exothermic Reactions
Next Generation: HS.PS1.4

Endothermic/Exothermic Reactions

Author: Nathan Lampson

Discover how energy transforms during chemical reactions and much more in this tutorial.  Compare and contrast endothermic and exothermic reactions, and learn how heat is either absorbed or released during chemical reactions. Learn how to use your sense of touch to determine if a chemical reaction is exothermic or endothermic.

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When chemical reactions occur, energy is either released or consumed during the reaction.


Exothermic reactions are chemical reactions that release energy.



Burning a candle is an example of an exothermic reaction because energy is being released during the reaction in the form of heat.



Endothermic reactions are chemical reactions that absorb energy.



When an egg is cooked over a stove the reaction taking place is endothermic.  The reaction absorbs the heat energy that is being produced by the stove burner.

Endothermic/Exothermic Reactions