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Thermodynamics
Free Energy
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Chemistry
Thermodynamics
Free Energy
Gibbs Free Energy
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1
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ΔG =
ΔH – TΔS
2
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If ΔG < 0,
the reaction is spontaneous in the forward direction.
3
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If ΔG > 0,
the reaction is nonspontaneous in the forward direction
4
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If ΔG = 0,
the system is at equilibrium
5
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Standard free energy of formation (∆G°f):
the free energy change for the formation of one mole of a substance from its elements in their standard state at 1 bar and 25 °C.
6
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ΔG° =
ΣnΔG° f (products) – ΣnΔG° f (reactants)