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17 terms

Chemistry Test 2

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Combustion
A chemical change, accompanied by the production of heat and light or burning.
Chemical change
any process determined by the atomic and molecular composition and structure of the substances involved
Specific heat
The amount of thermal energy required to raise the temperature of one kilogram of a substance by one Kelvin
Endothermic reaction
A reaction that absorbs energy in the form of heat
Exothermic reaction
A reaction that releases energy in the form of heat
Chemical formula
shows the number and kinds of atoms in a molecule
Chemical reaction
a process in which substances undergo chemical changes
Balanced chemical equation
A chemical equation in which there are the same number of elements and atoms on each side of the yield sign
Compound
A substance made of two or more elements chemically combined in a set ratio
Boiling Point
The temperature at which a liquid boils at a fixed pressure.
Precipitate
A solid that forms from a solution during a chemical reaction
Subscript
A number in a chemical formula that tells the number the number of atoms on a molecule or the ratio of elements in a compound
Reactants
A substance that enters into a chemical reaction
Alloy
a mixture made of two or more elements, at least one of which is a metal, which has the properties of a metal
Polymer
A large, complex molecule built from smaller molecules bonded together
Molecule
A combination of two or more atoms that are bonded together
Products
A substance formed as a result of a chemical reaction