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053 - Enthalpy of ReactionIn this video Paul Andersen explains how the enthalpy of a reaction can be released in an exothermic or consumed in an endothermic reaction. According to Hess's law if the reaction is reversed the sign of the enthalpy of reaction is also reversed. The overall enthalpy of reaction is the sum of all the individual reactions. A couple of enthalpy of reaction problems are worked out as well.


  • Science > Chemistry
  • Science > General

Education Levels:

  • Grade 9
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Enthalpy Reaction Chemical Chemistry Endotheric Exothermic Energy



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HS-PS1-4: Next Generation Science Standards

Develop a model to illustrate that the release or absorption of energy from a chemical reaction system depends upon the changes in total bond energy.
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