Name:
Date:
Block #:
Ice Melt Lab
Melting Ice: Change of State
I.
Question: What happens in regards to thermal energy and
temperature when water changes state from solid to liquid to gas?
II.
Background Information
Review solids, liquids, gases
When heat energy is added, ice melts. When heat energy
What is the difference in the
is taken away, water freezes. When heat energy is added,
particle arrangement?
liquid water turns to steam. When heat energy is taken
away, steam will change to liquid water.
Ice Melts at 0 degrees Celsius.
Water also freezes at 0 degrees
Celsius. Water boils at 100 degrees
Celsius. Steam condenses at 100
degrees Celsius.
Kinetic Theory
1. All matter is made of atoms and molecules
that act like tiny particles.
2. These tiny particles are always in motion.
The higher the temp., the faster the particles
move.
3. At the same temperature, more massive
(heavier) particles move slower than less
massive (lighter) particles.
Pre-Lab: In the space provided, draw what you think the temperature vs.
time graph will look like for the heating of ice.
III.
Hypothesis:
IV.
Materials (per group)
250 mL beaker
ice to fill beaker
thermometer
hot plate
Ring stand with clamp to hold thermometer
Graph paper
Timer
V. Procedure
1. Fill the 250 mL beakers with ice. Place on the hotplate.
2. Put the thermometer in the middle of the ice in one beaker. Allow the
temperature to settle for about 1-2 minutes.
3. Start the computer taking temperatures and turn on the hotplate to
high.
4. For the thermometer, take reading every 30 seconds until you reach
boiling.
5. Record the temperatures for the thermometer on the data table.
6. After you finish, turn off all hotplates.
7. Graph your data from the thermometer using the graph paper
provided.
VI. Data
Create a data chart to keep track of your data.
Use graph paper to graph your data when you are finished with the lab.
VII. Conclusion Questions
1. Label the melting point, boiling point, and any phase changes on
your graph.
2. At the boiling point, is there still heat transfer? Why or why not?
3. What happens to the temperature during a change of state? What
happens to the thermal energy during a change of state?
4. Compare the graph that you drew before the lab with the graph you
made from the data. Did your prediction match the data that you
graphed from the lab? Explain.
5. What have you learned about thermal energy and temperature
during a change of state? How does graphing your data help you
understand this concept?
Name:
Date:
Block #:
Change of State Lab Worksheet
Background Information:
Explain the difference in particle arrangement of
solids, liquids and gases?
Pre
Lab
Hypothesis:
Data Chart
Time
Temp
Time
Temp
30
6
1
6.5
1.5
7
2
7.5
2.5
8
3
8.5
3.5
9
4
9.5
4.5
10
5
10.5
5.5
11
*Indicate where boiling occurred and freezing
occurred
Conclusion Questions: