Online College Courses for Credit

Energy and Enthalpy

Energy and Enthalpy

Author: carolyn fruin

Learning Targets:

  • I can explain heat of reaction, heat of formation, heat of combustion and enthalpy change.
  • I can perform specific heat calculations (review from earlier).
  • I can solve problems involving changes in enthalpy for various reactions.
  • I can CLEARLY distinguish between heat and temperature and explain how they are NOT the same.
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Enthalpy Power Point (17-1)

This power point introduces enthalpy and has several examples on solving different heats of reaction problems.

Example Problem - Hess' Law

This is an example problem of solving the heat of a reaction using Hess' law. It shows step by step what to do with each piece of information given. Don't skip this!!!

Source: KhanAcademy

Chemical Reactions and Energy Reading

Every chemical reaction involves the breaking and formation of chemical bonds. Because of this, energy is an important aspect of these processes. This reading defines and describes enthalpy - the energy of chemical reactions.



Video: Heat of a Reaction

Here is an example of using [products - reactants] to find the heat of a reaction. Since enthalpy, entropy and free energy are all state functions, you can use this method to calculate these quantities for any reaction given the standard values.

Source: KhanAcademy

Video: Exothermic and Endothermic

A basic video defining and contrasting exothermic and endothermic changes.

Source: chemistNATE youtube channel

Computer Tutorials - Energy and Calorimetry

View the following tutorials to see simulations of energy concepts along with sample problems to try.



Source: W. W. Norton & Company