Phase Change

Question 1

it is a physical change from one
phase to another.

Answer 1

PHASE CHANGE

Question 2

always occurs whenever a substance changes phase

Answer 2

Heat transfer

Question 3

Solid to liquid

Answer 3

Melting

Question 4

Heat goes into the solid as it melts.

Answer 4

Melting

Question 5

Liquid to solid

Answer 5

Freezing

Question 6

Heat leaves the liquid as it freezes.

Answer 6

Freezing

Question 7

Liquid to gas

Answer 7

Vaporization, which includes boiling and evaporation

Question 8

Heat goes into the liquid as it vaporizes.

Answer 8

Vaporization, which includes boiling and evaporation

Question 9

Gas to liquid

Answer 9

Condensation

Question 10

Heat leaves the gas as it condenses.

Answer 10

Condensation

Question 11

Solid to gas

Answer 11

Sublimation

Question 12

Heat goes into the solid as it sublimates.

Answer 12

Sublimation

Question 13

is the amount of heat needed to change one gram of a substance from the solid to the liquid phase without a change in temperature.

Answer 13

HEAT OF FUSION

Question 14

HEAT OF FUSION
is the amount of heat needed to change ——— of a substance from the solid to the liquid phase without a change in temperature.

Answer 14

one gram

Question 15

HEAT OF FUSION
is the amount of heat needed to change one gram of a substance from the —— to the —— phase without a change in temperature.

Answer 15

solid
liquid

Question 16

is the production of vapor or
gas from matter in another phase.

Answer 16

VAPORIZATION

Question 17

The amount of heat needed to change 1 kg of a substance from the liquid phase to the gas phase.

Answer 17

HEAT OF VAPORIZATION

Question 18

HEAT OF VAPORIZATION
= The amount of heat needed to change ——— of a substance from the liquid phase to the gas phase.

Answer 18

1 kg

Question 19

HEAT OF VAPORIZATION
= The amount of heat needed to change 1 kg of a substance from the —— phase to the —— phase.

Answer 19

liquid
gas

Question 20

is the tendency of matter to change in shape, volume, and area in response to a change in temperature.

Answer 20

THERMAL EXPANSION

Question 21

Generally, matter solids, liquids, and gases —— when heated and —— when cooled.

Answer 21

expand
contract

Question 22

ALL gases, liquids, and MOST solids —— when their temperature increases.

Answer 22

expand

Question 23

Why do solids expand when heated?

Answer 23

Molecules in solids are very close to each other and move or vibrate in their position.

Question 24

When heat is added to the solid, the kinetic energy of the molecules ——-, and their vibrations —— up.

Answer 24

increases
speed

Question 25

When solids are heated- they
When solids are cooled- they

Answer 25

expand
contract

Question 26

When liquid is heated, the kinetic energy of molecules increases As the molecules move faster, they move farther away from each other, causing the liquid to expand.

Answer 26

EXPANSION OF LIQUIDS

Question 27

Generally, liquids ———- when heated and ———- when cooled.

Answer 27

expand
contract

Question 28

However, ———— does not obey this rule.

Answer 28

water

Question 29

As water is heated fromO°C to 4°C, it

Answer 29

contracts

Question 30

As water is heated from ———, it contracts

Answer 30

0°C to 4°C

Question 31

Similarly, if you cool water down to 4°C, it ———.
If you cool it further from 4°C to 0°C, water ———.

Answer 31

contracts

expands

Question 32

Similarly, if you cool water down to ——, it contracts.
If you cool it further from ——, water expands.

Answer 32

4°C

4°C to 0°C

Question 33

The ——- when heated is due to the increased kinetic energy of the molecules.

Answer 33

expansion of gases

Question 34

If the temperature of a gas, liquid, and solid is raised by the same amount, the gas will expand the ——-, the liquid ——, and the solid the ——.

Answer 34

most
less
least

Question 35

Which one heats up and cools down faster? Land or Water?

Answer 35

Land

Question 36

is a measure of the amount of heat energy required to change the temperature of 1 kg of a material by 1 K.

Answer 36

SPECIFIC HEAT CAPACITY

Question 37

The ability of a substance to absorb or release heat energy is called

Answer 37

SPECIFIC HEAT.

Question 38

J/kg.°C or K = is the SI unit of

Answer 38

specific heat.

Question 39

The ability of a substance to absorb or release het energy

Answer 39

Specific heat capacity

Question 40

is an important property of matter because it can identify substances as well as decide which substances can be used for specific purposes.

Answer 40

Specific heat