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Chemical Reactions
Term | Definition |
---|---|
Activation Energy | What is needed to start a chemical reacation |
Arrow | You read the arrow as yields in A CHEMICAL EQUATION OR FORMULA |
Characteristics of a chemical reaction | changes in energy or changes in properties color change precipitate forms or temperature change |
Chemical equations | a shorter easier way to show chemical reactions |
coefficient | a number placed in front of a chemical formula in a equation |
conservation of mmatter | the amount of matter used in a chemical reaction does not change |
controlling rates of reaction | concentration temperature surface area catalyst enzymes and inhibitors |
decomposition reaction | a compound breaks down into smaller substances |
endothermic reaction | an observable change in energy that shows a chemical reaction took place |
exothermic reaction | an observable change in energy that shows a chemical reaction took place |
physical change | alter only the physical properties of matter |
precipate | a solid that forms of solution during a chemical reaction |
products | the material you have after a chemical reaction |
reactants | the materials you have at the beginning if a chemical reaction |
replacement reaction | one part of a compound is displaced by and element |
states of matter | solid liquid gas |
subscripts | show the number of atoms of an element in a molecule or the ratio of elements in a compound |
synthesis reaction | two substances combine to form a new compound also called composition reaction |