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Chemical Change
| Term | Definition |
|---|---|
| Physical Change | is any change that alters the form or appearance of a substance but does not change it into another substance |
| Chemical Change | A change in matter that produces one or more new substances |
| Reactants | Substances that undergo the chemical changes |
| Products | New substances that form |
| Precipitate | A solid that forms from liquids during chemical reaction |
| Exothermic Reaction | The energy released as the products form is greater than the energy required to break bonds of the reactants |
| Endothermic Reaction | More energy is required to break bonds of the reactants than is released by the formation of the products |
| Chemical Equation | A way to show a chemical reaction, using symbols instead of words |
| Law of Conservation of Mass | States that during a chemical reaction matter is not created or destroyed |
| Open System | Matter can enter from or escape to the surroundings |
| Closed System | Matter does not enter or leave |
| Coefficient | A number placed in front of a chemical formula in an equation |
| Synthesis | When two or more complex substances, the reaction |
| Decomposition | A reaction when compounds break down into simpler products. |
| Replacement | The reaction when one element replaces another element in a compound or if two elements in different compounds trade places |
| Activation Energy | The minimum amount of energy needed to start a chemical reaction |
| Concentration | The amount of a substance in a given volume |
| Catalyst | Lowering the activation energy needed |
| Enzymes | The cells in your body containing thousands of biological catalyst |
| Inhibitor | A material used to decrease the rate of a chemical reaction |
Created by:
ForemanL