Chemistry A-Level
Activation energy and reaction rate
What Activation energy and reaction rate means in Chemistry A-Level, as defined for OCR.
Definition of Activation energy and reaction rate
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Reference: OCR
A reaction with a large negative ∆G can still be immeasurably slow at room temperature if its activation energy is high, because few particles have enough energy to overcome the barrier.
Topics that use Activation energy and reaction rate
- Enthalpy and entropy (OCR A-Level)
Related terms
- 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
- Gibbs free energy and feasibility
- Number of accessible microstates in each state
Using Activation energy and reaction rate in the exam
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