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Phys. Sci. Chap. 7
Vocabulary
Question | Answer |
---|---|
Reactant | A substance or molecule that participates in a chemical reaction. |
Product | A substance that forms in a chemical reaction. |
Chemical Energy | The energy released when a chemical compound reacts to produce new compounds. |
Exothermic Reaction | A chemical reaction in which energy is released to the surroundings as heat. |
Endothermic Reaction | A chemical reaction that requires energy input |
Chemical Equation | A representation of a chemical reaction that uses symbols to show the relationship between the reactants and the products. |
Mole Ratio | The relative number of moles of the substances required to produce a given amount of product in a chemical reaction. |
Synthesis Reaction | Reaction in which two or more substances combine to form a new compound. |
Decomposition Reaction | A reaction in which a single compound breaks down to form two or more simpler substances. |
Combustion Reaction | The oxidation reaction of an organic compound, in which heat is released. |
Single-displacement Reaction | A reaction in which one element or radical takes the place of another element or radical in a compound. |
Double-displacement Reaction | A reaction in which a gas, a solid precipitate, or molecular compound forms from the apparent exchange of atoms or ions between two compounds. |
Free Radical | An atom or a group of atoms that has one unpaired electron. |
Oxidation-reduction Reaction | Any chemical change in which one species is oxidized (loses electrons) and another species is reduced (gains electrons); also called redox reaction. |
Catalyst | A substance that changes the rate of a chemical reaction without being consumed or changed significantly. |
Enzyme | A molecular, either protein or RNA, that acts as a catalyst in biochemical reactions. |
Substrate | The reactant in reactions catalyzed by enzymes. |
Chemical Equilibrium | A state of balance in which the rate of forward reaction equals the rate of the reverse reaction and the concentrations of products and reactants remain unchanged. |