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ch 21
| Question | Answer |
|---|---|
| Chemical reaction | changed into new substances |
| Reactant | substance that reacts |
| Product | new substance that is formed |
| Chemical equation | shorthand method |
| Coefficient | represents the number of units of substance |
| Balanced chemical equation | the same number of atoms of each element on both sides of the equation |
| Combustion reaction | chemical reaction when a substance reacts with oxygen |
| Synthesis reaction | two or more substances combine to form a different substance |
| Decomposition reaction | chemical reaction which one substance breaks down into ( two or more substances) |
| Single-displacement reaction | one element replaces another element in a compound |
| Double-displacement reaction | when two ionic compounds in solution are combined |
| Precipitate | double-displacement reaction |
| Oxidation | loss of electrons |
| Reduction | gain of electrons |
| Exergonic reaction | chemical reaction that (releases) some form of energy such as light or heat |
| Exothermic reaction | chemical reaction in which energy is (given off) in the form of heat |
| Endergonic reaction | chemical reaction that requires energy (input) (heat, light, or electricity) in order to proceed |
| Endothermic reaction | chemical reaction that requires heat energy in order to proceed |
| Catalyst | speeds up a chemical reaction |
| Inhibitor | slows down a chemical reaction |