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Chemical Reactions

TermDefinition
Activation Energy What is needed to start a chemical reaction
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
chemical change alter the chemical properties of matter new substances with new properties are formed.
Chemical Equations a shorter easier way to show chemical reactions.
coefficient a number placed in front of a chemical formula is an equation
conservation of mass the amount of matter involved in a chemical reaction does not change .
controlling rates of a reaction concentration, temp, surface area, catalysts ,enzymes and inhibitors
decomposition reaction a compound breaks down into a simpler substance
endothermic reaction observable change in energy that shows a chemical reaction took place (makes it feel cooler)
exothermic reaction observable change in energy that shows a chemical reaction took place (heat is given off)
physical changes alter only the physical properties of matter no new substances are formed
precipitate solid that forms from solution during a chemical reaction
products materials you have after a chemical reaction
reactants materials you have at the begging of a chemical reaction
Replacement reaction one part of a compound is displayed by an element or compound
states of matter solid liquid gas
sudscripts show the number of atoms of an element in a molecule or the ration of elelments
synthesis reaction two substances combine to form a new compound
Created by: 150007835
 

 



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