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CHEM CH 5 Vocabulary

change is size, shape, or statephysical change
changes into a new substance with new propertieschemical change
heat is absorbed; feels "cold"endothermic
heat is released; feels "hot"exothermic
matter is allowed to enter or exitopen system
matter is NOT allowed to enter or exit (it's trapped)closed system
matter is not created or destroyed; "what you start with is what you end with"law of conservation of mass
the ingredients of a chemical reactionreactants
the result of a chemical reactionproducts

Bryan Middle School
Elmhurst, IL

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