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Chapters 6

Chemical Reactions

QuestionAnswer
a change in matter that produces one or more new substances is a chemical change chemical reaction
a short, easy way to show a chemical reaction, using symbols instead of words chemical equation
a reaction in which energy is absorbed endothermic reaction
a reaction that releases energy in the form of heat exothermic reaction
the substances you have at the beginning of a chemical equation reactants
the substances you have when a reaction is complete products
matter can enter into or escape to the surroundings open system
matter is not allowed to enter or leave closed system
a number placed in front of a chemical formula in an equation coefficient
when two or more elements or compounds combine to make a more complex substance synthesis
a process that breaks down compounds into simpler products decomposition
when one element replaces another in a compound, or when two elements in different compounds trade places. replacement
the minimum amount of energy needed to start a reaction activation energy
a material that increases that rate of a reaction by lowering the activation energy catalyst
a material used to decrease the rate of a reaction inhibitor
anything that has mass and takes up space matter
the study of matter and how it changes chemistry
a characteristic of a substance that can be observed without changing the substance into another physical property
a characteristic of a substance that describes its ability to change into another substance chemical property
any change that alters the form or appearance of a substance but does not change into another substance physical change
a solid that forms from solution during a chemical reaction precipitate
matter is not created or destroyed during a chemical reaction conservation of mass
a biological catalyst enzyme
a rapid reaction between oxygen and a fuel combustion
a material that releases energy when it burns fuel
the amount of substance in a given volume concentration
Created by: KerriReynolds
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