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Chemical Reaction
Chapter 14- Chemical Reaction Flashcards
| Term | Definition |
|---|---|
| Chemical reaction | happens when substances break apart or combine to form one or more new substances |
| Precipitate | a solid substance that forms is a solution |
| Chemical formula | a combination of chemical symbols and numbers to represent a substance |
| Superscript | number that tells you how many atoms of an element are in a molecule |
| Chemical equation | a representation of a chemical reaction that uses symbols to show the relationship between the reactants and the products |
| Reactants | a substance or molecule that participates in a chemical reaction |
| Products | a substance that forms in a chemical reaction |
| Law of conservation of mass | the law that states the mass cannot be created or destroyed in ordinary chemical and physical changes |
| Coefficient | a number that is placed in front of a chemical formula |
| Decomposition reaction | reaction in which a single compound breaks down to form two or more simpler substances |
| Single displacement reaction | a reaction in which one element takes the place of another element in a compound |
| Double displacement reaction | a reaction in which a gas, solid precipitate, or a molecular compound forms from the exchange of ions between two compounds |
| Exothermic reaction | a chemical reaction in which heat is released to the surroundings |
| Endothermic reaction | a chemical reaction that requires heat |
| Law of conservation of energy | a law that states that energy cannot be created or destroyed but can be changed from one form to another |
| Activation of energy | the minimum amount or energy required to start a chemical reaction |
| Inhabitor | a substance that slows down or stops a chemical reaction |
| Catalyst | a substance that changes the rate of a chemical reaction without being used up or changed very much |
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