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Chapter 2 Flashcards

(17 cards)

1
Q

the process by which one or more substances change to produce one or more different substances

A

chemical reaction

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2
Q

a solid that is produced as a result of a chemical reaction in solution

A

precipitate

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3
Q

a combination of chemical symbols and numbers to represent a substance

A

chemical formula

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4
Q

a representation of a chemical reaction that uses symbols to show the relationship between the reactants and the products

A

chemical equation

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5
Q

a substance or molecule that participates in a chemical reaction

A

reactant

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6
Q

the substance that forms in a chemical reaction

A

product

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7
Q

the law that states that mass cannot be created or destroyed in ordinary chemical and physical changes

A

law of conservation of mass

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8
Q

a reaction in which two or more substances combine to form a new compound

A

synthesis reaction

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9
Q

a reaction in which a single compound breaks down to form two or more simpler substances

A

decomposition reaction

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10
Q

a reaction in which one element or radical takes the place of another element or radical in a compound

A

single- displacement reaction

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11
Q

a reaction in which a gas, a solid precipitate, or a molecular compound forms from the exchange of ions between two compounds

A

double- displacement

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12
Q

a chemical reaction in which heat is released to the surroundings

A

exothermic reaction

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13
Q

a chemical reaction that requires heat

A

endothermic reaction

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14
Q

the law that states that energy can not be created or destroyed but can be changed from one form to another

A

law of conservation of energy

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15
Q

the minimum amount of energy required to start a chemical reaction

A

activation energy

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16
Q

a substance that slows down or stops a chemical reaction

17
Q

a substance that changes the rate of a chemical reaction without being used up or changed very much