Chapter 2

Question 1

Sec 1

Answer 1

.

Question 2

chemical reaction

Answer 2

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

Question 3

precipitate

Answer 3

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

Question 4

Sec 2

Answer 4

,

Question 5

Chemical formula

Answer 5

a combination of chemical symbols and numbers to represent a substance

Question 6

chemcial equations

Answer 6

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

Question 7

reactant

Answer 7

a substance or molecule that participates in a chemical reaction

Question 8

product

Answer 8

the substance that forms in a chemical reaction

Question 9

synthesis reactions

Answer 9

a reactions in which two or more substances combine

Question 10

decompistion

Answer 10

a reaction in which a single compound breaks down

Question 11

single diplacement reaction `

Answer 11

a reaction in which one element or radical takes place

Question 12

double displacement

Answer 12

a reaction in which a gas forms the exchange of ions between two compounds

Question 13

exothermic reaction

Answer 13

a chemical reaction in which heat is released to the surroundings

Question 14

endothermic reaction

Answer 14

a chemical reaction that requires heat

Question 15

law of conservation of energy

Answer 15

energy can not be created or destroyed

Question 16

activation

Answer 16

the mininmum amount of energy reqired

Question 17

a catatalyst

Answer 17

is a substance that speeds up a reaction