Activation Energy
| Formula / Notation | Ea; k = Ae^(−Ea/RT) (Arrhenius) |
|---|---|
| Also Known As | Energy of activation; threshold energy; Ea; Arrhenius activation energy |
What is Activation Energy?
Activation energy (Ea) is the minimum amount of energy that reacting molecules must possess in order for a chemical reaction to occur. It represents the energy barrier that must be overcome for reactants to be converted to products. Catalysts work by providing an alternative reaction pathway with a lower activation energy.
Formula & Notation
Other Names / Synonyms: Energy of activation; threshold energy; Ea; Arrhenius activation energy
Properties & Characteristics
Uses & Applications
Safety Information
Always consult the SDS/MSDS before handling any chemical. This information is for educational purposes only.
Key Facts
Frequently Asked Questions
Activation energy (Ea) is the minimum amount of energy that reacting molecules must possess in order for a chemical reaction to occur. It represents the energy barrier that must be overcome for reactants to be converted to products. Catalysts work by providing an alternative reaction pathway with a lower activation energy.
Designing catalysts and inhibitors; understanding reaction mechanisms; controlling reaction rates in industrial processes; food preservation (refrigeration slows reactions by reducing molecular energy below Ea)
No direct hazard — a thermodynamic/kinetic concept. Reactions with low activation energies can proceed rapidly or explosively if initiated.
The formula or notation for Activation Energy is: Ea; k = Ae^(−Ea/RT) (Arrhenius)