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Chapter 21

Vocabulary

TermDefinition
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
Created by: 4640