| A | B |
|---|
| catalyst | A substance that is used to change the rate of a chemical reaction but is unchanged by the reaction. |
| chemical energy | The energy stored in chemical bonds |
| chemical reaction | The original substance is changed into a new substance. |
| concentration | The amount of substance in a given volume. |
| endothermic reaction | Reaction in which energy is absorbed. |
| equilibrium | Same rate for the forward and reverse rates of a reaction. |
| exothermic reaction | Reaction that releases energy. |
| products | The new substance(s) formed in a reaction. |
| reactants | Substance(s) that are produces by a chemical reaction. |
| reaction rate | The time it takes for the reactants to change into products. |
| reversible reaction | The change of the reactants into products and the products into the reactants happens at the same time. |
| surface area | The outside layer of something. |
| chemical bonds | The force that holds atoms or ions together. |
