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2.4-2.5 Terms
| Term | Definition |
|---|---|
| Chemical reaction | Process by which substances change into different substances through the breaking and forming of chemical bonds. |
| Reactant | Substance that is changed by a chemical reaction. |
| Product | Substance formed by a chemical reaction. |
| Bond energy | Amount of energy needed to break a bond between two particular atoms; or the amount of energy released when a bond forms between |
| Equilibrium | Condition in which reactants and products of a chemical reaction are formed at the same rate. |
| Activation energy | Energy input necessary to initiate a chemical reaction. |
| Exothermic | Chemical reaction that yields a net release of energy in the form of heat. |
| Endothermic | Chemical reaction that requires a net input of energy. |
| Catalyst | Substance that decreases activation energy and increases reaction rate in a chemical reaction. |
| Enzyme | Proteins that catalyzes chemical reaction for organisms. |
| Substrate | Reactant in a chemical reaction upon which an enzyme acts. |