22.5 The Definition of Gibbs Free Energy (Video)

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This project was preformed to supply Libretext Authors with videos on General Chemistry topics which can be used to enhance their projects. Also, these videos are meant to act as a learning resource for all General Chemistry students.

Video Topics

The spontaneity of a reaction is related to H_rxn and S_rxn

Second law of thermodynamics: All spontaneous processes produce an increase in the entropy of the universe S_univ = S_sys + S_sur> 0

From this we can derive the equation for Gibbs free energy change (kJ/mol): G = H - TS

Remember we want S_univ > 0 so:

G < 0 If G is negative, the reaction is spontaneous.

G > 0 If G is positive, the reaction is non-spontaneous.

G = 0 If G = 0, the reaction is at equilibrium

Link to Video

The Definition of Gibbs Free Energy: https://youtu.be/iuWkcHUh-1o

Attribution

Prof. Steven Farmer (Sonoma State University)