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Chemical Change

TermDefinition
Physical Change is any change that alters the form or appearance of a substance but does not change it into another substance
Chemical Change A change in matter that produces one or more new substances
Reactants Substances that undergo the chemical changes
Products New substances that form
Precipitate A solid that forms from liquids during chemical reaction
Exothermic Reaction The energy released as the products form is greater than the energy required to break bonds of the reactants
Endothermic Reaction More energy is required to break bonds of the reactants than is released by the formation of the products
Chemical Equation A way to show a chemical reaction, using symbols instead of words
Law of Conservation of Mass States that during a chemical reaction matter is not created or destroyed
Open System Matter can enter from or escape to the surroundings
Closed System Matter does not enter or leave
Coefficient A number placed in front of a chemical formula in an equation
Synthesis When two or more complex substances, the reaction
Decomposition A reaction when compounds break down into simpler products.
Replacement The reaction when one element replaces another element in a compound or if two elements in different compounds trade places
Activation Energy The minimum amount of energy needed to start a chemical reaction
Concentration The amount of a substance in a given volume
Catalyst Lowering the activation energy needed
Enzymes The cells in your body containing thousands of biological catalyst
Inhibitor A material used to decrease the rate of a chemical reaction
Created by: ForemanL
 

 



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