C

Question 1

During a change of state:

1. what increases?
2. what remains the same?

Answer 1

1. energy
2. temp

Question 2

Internal energy is the sum of ? and ?

Answer 2

kinetic and potential energy of all particles

Question 3

Latent heat of ______ is the change of state between solid and liquid

Answer 3

fusion

Question 4

latent heat of _____________ is the change of state between liquids and gases

Answer 4

vaporization

Question 5

Gas molecules are in ________ ________ motion

Answer 5

constant random motion

Question 6

the ? of the gas is related to the…

Answer 6

temperature

average kinetic energy

Question 7

changing the temperature of a gas changes ?

Answer 7

the pressure exerted by the gas

Question 8

Why are gases easy to compress?

1. gap
2. forces

Answer 8

1. particles do not touch / large gaps between them
2. easy to push together / forces between particles is negligible

Question 9

Cooling:

1. speed
2. movement

Answer 9

1. cools down so particles move slower than in gas
2. as it cools particles move closer

Question 10

Internal Energy:

1. decreases as potential energy
2. kinetic energy

Answer 10

1. decreases as potential energy changes with change of state
2. kinetic energy of particles decreases with temp

Question 11

Specific latent heat of vaporization is the..

1. ______ -> ___

Answer 11

1. amount of energy needed to change the state of a substance from liquid to gas

Question 12

Energy increases ? between melting and evaporation (3)

Answer 12

1. kinetic
2. internal
3. temperature