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Chapter 21
Vocabulary
Term | Definition |
---|---|
balanced chemical equation | chemical equation with the same number of atoms of each element on both sides |
catalyst | substance that speeds up a chemical reaction without being permanently changed itself |
chemical equation | shorthand method to describe chemical reactions using chemical formulas and other symbols. |
chemical reaction | process in which one or more substances are changed into new substances. |
coefficient | number in a chemical equation that represents the number of units of each substance taking part in a chemical reaction |
combustion reaction | a type of chemical reaction that occurs when a substance reacts with oxygen to produce energy in the form of heat and light |
decomposition reaction | chemical reaction in which one substance breaks down into two or more substances |
double-displacement reaction | chemical reaction that produces a precipitate water or a gas when two ionic compounds in solution are combined |
endergonic reaction | chemical reaction that requires energy input in order to proceed |
endothermic reaction | chemical reaction that requires heat energy is primarily given off in the form of heat |
exergonic reaction | chemical reaction that releases some form of energy such as light or heat |
exothermic reaction | chemical reaction in which energy is primarily given off in the form of heat |
inhibitor | substance that slows down a chemical reaction or prevents it from occurring by combining with a reactant |
oxidation | the loss of electrons from the atoms of a substance |
precipitate | insoluble compound that comes out of solution during a double-displacement reaction |
product | in a chemical reaction the new substance that is formed |
reactant | in a chemical reaction the substance that reacts |
reduction | the gain of electrons by the atoms of a substance |
single-displacement | chemical reaction in which one element replaces another element in a compound |
synthesis reaction | chemical reaction in which two or more substances combine to form a different substance |