chapter 2

Question 1

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

Answer 1

chemical reaction

Question 2

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

Answer 2

precipitate

Question 3

a combination of chemical symbols and numbers to represent a substance

Answer 3

chemical formula

Question 4

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

Answer 4

chemical equation

Question 5

a substance or molecule that participates in a chemical reaction

Answer 5

reactant

Question 6

the substance that forms in a chemical reaction

Answer 6

product

Question 7

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

Answer 7

synthesis reaction

Question 8

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

Answer 8

decomposition reaction

Question 9

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

Answer 9

single-displacement reaction

Question 10

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

Answer 10

double-displacement reaction

Question 11

a chemical reaction in which heat is released to the surroundings

Answer 11

exothermic reaction

Question 12

a chemical reaction that requires heat

Answer 12

endothermic reaction

Question 13

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

Answer 13

law of conservation of energy

Question 14

the minimum amount of energy needed to start a chemical reaction

Answer 14

activation energy

Question 15

a substance that slows down or stops the chemical reaction

Answer 15

inhibitor

Question 16

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

Answer 16

catalyst