Chemistry Unit 2

Question 1

Chemistry

Answer 1

is the study of the structure, properties, composition, mechanisms, and reactions of organic compounds.

Question 2

Matter

Answer 2

physical substance in general, as distinct from mind and spirit; (in physics) that which occupies space and possesses rest mass, especially as distinct from energy.

Question 3

Extensive Properties

Answer 3

Extensive properties, such as mass and volume, depend on the amount of matter being measured.

Question 4

Intensive Properties

Answer 4

Intensive properties, such as density and color, do not depend on the amount of the substance present.

Question 5

Mass

Answer 5

a body of coherent matter, usually of indefinite shape and often of considerable size:

Question 6

Volume

Answer 6

a collection of written or printed sheets bound together and constituting a book.

Question 7

Physical Property

Answer 7

Physical properties can be observed or measured without changing the composition of matter.

Question 8

Physical Change

Answer 8

Physical changes are changes affecting the form of a chemical substance, but not its chemical composition. Physical changes are used to separate mixtures into their component compounds, but can not usually be used to separate compounds into chemical elements or simpler compounds.

Question 9

Chemical Property

Answer 9

A chemical property is any of a material’s properties that becomes evident during, or after, a chemical reaction; that is, any quality that can be established only by changing a substance’s chemical identity. … They can also be useful to identify an unknown substance or to separate or purify it from other substances.

Question 10

Chemical Change

Answer 10

Chemical changes occur when a substance combines with another to form a new substance, called chemical synthesis or, alternatively, chemical decomposition into two or more different substances.

Question 11

Phase

Answer 11

Mass transfer is the net movement of mass from one location,

Question 12

Solid

Answer 12

having three dimensions (length, breadth, and thickness), as a geometrical body or figure.

Question 13

Liquid

Answer 13

composed of molecules that move freely among themselves but do not tend to separate like those of gases; neither gaseous nor solid.

Question 14

Gas

Answer 14

a substance possessing perfect molecular mobility and the property of indefinite expansion, as opposed to a solid or liquid.

Question 15

Freezing

Answer 15

(of temperatures) approaching, at, or below the freezing point.

Question 16

Melting

Answer 16

to become liquefied by warmth or heat, as ice, snow, butter, or metal

Question 17

Vaporization

Answer 17

of an element or compound is a phase transition from the liquid phase to vapor.

Question 18

Condensation

Answer 18

the act of condensing; the state of being condensed.

Question 19

Sublimation

Answer 19

the diversion of the energy of a sexual or other biological impulse from its immediate goal to one of a more acceptable social, moral, or aesthetic nature or use.

Question 20

deposition

Answer 20

removal from an office or position.

Question 21

Substance

Answer 21

that of which a thing consists; physical matter or material:

Question 22

Element

Answer 22

a component or constituent of a whole or one of the parts into which a whole may be resolved by analysis:

Question 23

Chemical Symbol

Answer 23

an abbreviation or short representation of a chemical element; the symbols in the periodic table

Question 24

Compound

Answer 24

composed of two or more parts, elements, or ingredients:

Question 25

Mixture

Answer 25

any combination or blend of different elements, kinds, qualities, etc.:

Question 26

Homogeneous Mixture

Answer 26

any combination of substances that has uniform composition and properties; a mixture that is uniform throughout

Question 27

Solution

Answer 27

the act of solving a problem, question, etc.:

Question 28

Heterogeneous Mixture

Answer 28

any combination of substances that does not have uniform composition and properties; a mixture of physically distinct substances with different properties

Question 29

Filtration

Answer 29

liquid that has been passed through a filter.

Question 30

Distillation

Answer 30

the volatilization or evaporation and subsequent condensation of a liquid, as when water is boiled in a retort and the steam is condensed in a cool receiver.

Question 31

Chemical Reaction

Answer 31

a reverse movement or tendency; an action in a reverse direction or manner

Question 32

Reactant

Answer 32

a person or thing that reacts.

Question 33

Product

Answer 33

a person or thing produced by or resulting from a process, as a natural, social, or historical one; result:

Question 34

Precipitate

Answer 34

to cast down headlong; fling or hurl down.

Question 35

Law of Conservation of Mass

Answer 35

the principle that in any closed system subjected to no external forces, the mass is constant irrespective of its changes in form; the principle that matter cannot be created or destroyed.