Chemistry A-Level
Gibbs free energy and feasibility
What Gibbs free energy and feasibility means in Chemistry A-Level, as defined for OCR.
Definition of Gibbs free energy and feasibility
Check what you remember
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Reference: OCR
The relation ∆G = ∆H − T∆S links the enthalpy change and the entropy term, and a process is feasible when ∆G is negative, equivalently when ∆H − T∆S < 0.
Topics that use Gibbs free energy and feasibility
- Enthalpy and entropy (OCR A-Level)
Related terms
- Activation energy and reaction rate
- Comparison of solid, liquid and gas
- Entropy change and the T∆S term
- Entropy of the system
- Feasibility and the sign of ∆G
- Freedom of motion of particles in each state
- Gibbs equation and free energy change
- Number of accessible microstates in each state
Using Gibbs free energy and feasibility in the exam
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