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Bookmark or Share- Gibbs free energy and spontaneity (article) | Khan AcademyKey points. The second law of thermodynamics says that the entropy of the universe always increases for a spontaneous process: Δ S universe = Δ S system + Δ S surroundings > 0. . At constant temperature and pressure, the change in Gibbs free energy is defined as Δ G = Δ H − T Δ S. .
- Gibbs (Free) Energy - Chemistry LibreTextsGibbs free energy, denoted G, combines enthalpy and entropy into a single value. The change in free energy, ΔG, is equal to the sum of the enthalpy plus the product of the temperature and entropy of the system. ΔG can predict the direction of the chemical reaction under two conditions:
- 19.7: ΔG° and K as Functions of Temperature - Chemistry LibreTextsTo illustrate this concept, the equation relating free energy change to the enthalpy and entropy changes for the process is considered: ΔG = ΔH − TΔS.
- Enthalpy, Entropy & Free Energy | Overview & RelationshipThe equation for delta S is Delta S = Q/T, where Q is the heat transferred to the system and T is the temperature. What does Delta S represent? Delta S represents the change in...
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