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C2.4 Glossary
Rates and Energy Glossary
Term | Definition |
---|---|
Catalyst | A substance that speeds up a chemical reaction but remains chemically unchanged itself at the end of the reaction. |
Collision Theory | An explanation of chemical reactions in terms of reacting particles colliding with sufficient energy for a reaction to take place. |
Endothermic | A reaction that takes in energy from the surroundings. |
Exothermic | A reaction that gives out energy to the surroundings. |
Activation Energy | The minimum energy needed to start off a reaction. |