Chapter 6 Chemical Reactions

Question 1

Reactant

Answer 1

A substance or molecule that participates in a chemical reaction

Question 2

Product

Answer 2

A substance that forms in a chemical reaction

Question 3

Chemical energy

Answer 3

The energy released when a chemical compound reacts to produce new compounds

Question 4

Exothermic reaction

Answer 4

A chemical reaction in which heat is released to the surroundings
Ex-rusting iron

Question 5

Endothermic reaction

Answer 5

A chemical reaction that requires heat

Ex- photosynthesis

Question 6

Synthesis reaction

Answer 6

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

Question 7

Decomposition reaction

Answer 7

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

Question 8

Electrolysis

Answer 8

The process in which an electric current is used to produce a chemical reaction,such as the decomposition of water

Question 9

Combustion reaction

Answer 9

The oxidation. Reaction of an organic compound, in which heat is released

Question 10

Single-displacement reaction

Answer 10

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

Question 11

Double displacement reaction

Answer 11

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

Question 12

Oxidation-reduction reactions

Answer 12

Any chemical change in which one species is oxidized and another species is reduced

Question 13

Radical

Answer 13

An organic group that has one or more elections available for bonding

Question 14

Reduced

Answer 14

gaining of electrons

Question 15

Oxidized

Answer 15

Loss of electrons

Question 16

Chemical equation

Answer 16

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

Question 17

Mole ratio

Answer 17

The relative number of miles of the substances required to produce a given amount of product in a chemical reaction

Question 18

Coefficient

Answer 18

a multiplier or factor that measures some property

Question 19

Law of conservation of mass

Answer 19

States that mass is neither created nor destroyed by chemical reactions or physical transformations; the mass of the products in a chemical reaction must equal the mass of the reactants

Question 20

Law of definite proportions

Answer 20

A compound always contains the same element in the same proportions, regardless of how the compound is made or how much of the compound is formed

Question 21

Catalyst

Answer 21

A substance that changes the rate of a chemical reaction without being consumed or changed significantly

Question 22

Enzyme

Answer 22

A type of protein that speeds up metabolic reactions in plants and animals without being permanently changed or destroyed

Question 23

Substrate

Answer 23

A part, substances or element that lies beneath and supports another part, substance, or element. The reactant in reactions catalyzed by enzymes

Question 24

Chemical equilibrium

Answer 24

A state of balance in which the rate of a forward reactions equals the rate of the reverse reaction and the concentrations of products and reactants remain uncharged