Name: ___________________
Phase Change Review
1. One property that all particles of matter have in common is they:
a. Never move in solids
b. Only move in gases
c. Move constantly
d. None of the above
2. Describe solids, liquids and gases in terms of shape and volume:
Solids
Liquids
Definite shape (yes or no)
Definite volume (yes or no)
Gases
3. The volume of a gas can change but the volume of a solid cannot. Explain why this is true.
_____________________________________________________________________________
_____________________________________________________________________________
_____________________________________________________________________________
4. Identify the state of matter shown in the 1st jar. In the other two jars, draw the other two
states of matter:
5. Which has the most energy?
a. Particles of steam
b. Particles in liquid water
c. Particles in ice
d. Particles in freezing water
6. When a substance changes from one physical form to another, we say the substance has had
a(n) __________________________________.
7. The temperature at which a substance changes from a solid to a liquid is the
__________________ of the substance.
8. Melting is considered a(n) ________________________ change because energy is gained by
the substance as it changes state.
9. A substance’s _______________________ is the temperature at which it changes from a liquid
to a solid.
10. What happens if energy is added or removed from a glass of ice water?
_____________________________________________________________________________
_____________________________________________________________________________
11. Freezing is considered a(n) _______________________ change because energy is removed the
substance.
12. The change of state from a gas to a liquid is called _________________________.
13. The condensation point for a substance is the same as its __________________________.
14. For a substance to change from a gas to a liquid the particles must ______________________.
15. The temperature of a substance does not change before the _____________________ is
Use the graph below to answer the following questions:
16. What is the boiling point of this substance? ______________________________
17. Which state of matter is present at 30oC? _______________________________
18. Is this material going through endothermic changes or exothermic changes?
________________
19. What states of matter are present at 80oC? _______________________________
The following graph shows the different states of water as it is cooled. Examine the graph, and the
questions.
20. Which letters on the graph represent the three states of matter: gas, solid, and liquid?
•
•
•
Solid ___________
Liquid __________
Gas ____________
21. Which letters on the graph represent changes of state? ______________________________
22. Name the changes of state present on the graph. ___________________________________
23. How are heat and temperature the same?
24. How are heat and temperature different?
A WALK UP THE PHASE CHANGE GRAPH
*Using a color key, label the three states/phases of matter and the two phase changes.
*Also label “solid”, “liquid”, and “gas” in the appropriate locations.
200
150
Temperature (C)
Color Key:
Solid
Liquid
Gas
Melting
Evaporation
100
50
0
-50
-100
0
100
200
300
400
500
600
700
800
Time
1. What two states of matter are found during “melting” _____________ & _____________
2. According to graph above, what is the melting temperature of water? __________
3. What happens to the water temperature during “melting”? _____________________________
4. According to graph above, are we adding heat or removing heat? __________
5. What clue helps you see the answer to question 4? _____________________________
6. Based on your answer to question 4, is the graph above endothermic or exothermic? (circle)
7. During the “liquid” phase, the water is heating, thus the temperature is ___________________.
8. What two states of matter are found during evaporation? _____________ & _____________
9. What happens to the water temperature during evaporation? ___________________________
10. According to graph above, what is the evaporation temperature of water? __________
A STROLL DOWN THE PHASE CHANGE GRAPH
*Using a color key, label the three states/phases of matter and the two phase changes.
*Also label “solid”, “liquid”, and “gas” in the appropriate locations.
200
150
Temperature (C)
Color Key:
Solid
Liquid
Gas
Freezing
Condensation
100
50
0
-50
-100
0
100
200
300
400
500
600
700
800
Time
1. What two states of matter are found during condensation? _____________ & _____________
2. What happens to the water temperature during condensation? __________________________
3. According to graph above, what is the condensation temperature of water? __________
4. During the “liquid” phase, the water is cooling, thus the temperature is ____________________.
5. According to graph above, are we adding heat or removing heat? (circle)
6. What clue helps you see the answer to question 5? _____________________________
7. Based on your answer to question 5, is the graph above endothermic or exothermic? (circle)
8. What two states of matter are found during freezing _____________ & _____________
9. According to graph above, what is the freezing temperature of water? __________
10. What happens to the water temperature during freezing? ______________________________