Keep in mind that in our Thermochemistry unit, we already covered Enthalpy as the heat of reaction, and spent time using heat of formation values to calculate the over all change in enthalpy. Entropy and Free Energy can be calculated in a similar way from given values of Thermochemical data in a table or chart.

Watch these short videos and see if you can figure out how the basics of what each of the three terms means, and then see how each of the provided equations is used with given data to solve for the values for change in each. Pay close attention to the spontaneity of the reactions and how values for these can tell us if a reaction will be spontaneous or not.

Simple explanation of the relationship between Enthalpy, Entropy, and Free Energy:

__http://youtu.be/DPjMPeU5OeM__

Understanding Entropy (2 min version)

__http://youtu.be/RwQjNViBinE__

An excellent 5 minute video explaining Free Energy and Entropy:

__http://youtu.be/eeoUu4Nj7tQ__

Sample problem using Hess' Law, Entropy, and Gibbs Free Energy equations:

__https://www.youtube.com/watch?v=g_pHd_tt3d4__

Please make sure you watch these videos, then tackle the problems pertaining to this topic in your Big Idea #6 packet before Thursday. We'll take 30 minutes or so after school (before practice starts... you can be a few minutes late) to go over these.

See you Thursday!