22.5 The Definition of Gibbs Free Energy (Video)
- Page ID
- 342635
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Video Topics
The spontaneity of a reaction is related to Hrxn and Srxn
Second law of thermodynamics: All spontaneous processes produce an increase in the entropy of the universe Suniv = Ssys + Ssur > 0
From this we can derive the equation for Gibbs free energy change (kJ/mol): G = H - TS
Remember we want Suniv > 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
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Prof. Steven Farmer (Sonoma State University)