Chapter 13 Vocabulary
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Chemical Reaction
The process by which one or more substances change to produce one or more different substances.
Precipitate
A solid that is produced as a result of a chemical reaction in a solution.
Gas Formation
A gas that is formed when a chemical change takes place.
Solid Formation
A solid that is formed when a chemical change takes place.
Color Change
The change of color of a substance that shows that a chemical change is taking place.
Energy Change
Energy being given off or taken in that shows that a chemical change is taking place.
Chemical Formula
A combination of chemical symbols and numbers to represent a substance.
Subscript
A number below and to the right of an element to represent how many atoms of that element are in the compound.
Chemical Equation
A representation of a chemical reaction that uses symbols to show the relationship between the reactants and the products.
Reactant
A substance or molecule that participates in a chemical reaction.
Product
The substance that forms in a chemical reaction.
Law of Conservation of Mass
The law that states that mass cannot be created or destroyed in ordinary chemical and physical changes.
Synthesis Reaction
A reaction in which two or more substances combine to form a new compound.
Decomposition Reaction
A reaction in which a single compound breaks down to form two or more simpler substances.
Single-Displacement Reaction
A reaction in which one element or radical takes the place of another element or radical in a compound.
Double-Displacement Reaction
A reaction in which a gas, a solid precipitate, or a molecular compound forms from the exchange or ions between two compounds.
Exothermic Reaction
A chemical reaction in which heat is released to the surroundings.
Endothermic Reaction
A chemical reaction that requires heat.
Law of Conservation of Energy
The law that states that energy cannot be created or destroyed but can be changed from one form to another.
Activation Energy
The minimum amount of energy required to start a chemical reaction.
Inhibitor
A substance that slows down or stops a chemical reaction.
Catalyst
A substance that changes the rate of a chemical reaction without being used up or changed very much.