9.4 Chemical Reactions Can Be Exothermic or Endothermic

Bond Energies of a Reaction

A chemical reaction involves the breaking apart of bonds in the reactants and then the rearrangement of the atoms to form the products. This process requires the input and output of energy. Duration: 4:32.

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Energies In Chemical Reactions

The bond energies of the reactants and products can be examined to determine whether the reaction should be exothermic or endothermic. Duration: 7:01.

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KM: Rubbing Water

Kai and Maile encourage you to perform the "rubbing water" hands-on activity. The result may surprise you. Duration: 1:06.

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