Name: ____________________________
Student#: ____
THE MELTING AND VAPORIZATION POINT OF WATER
PURPOSE: To determine what happens to heat and temperature
during a phase change.
MATERIALS:
Crushed Ice (or snow)
Hot Plate
500 mL Beaker
Stirring Rod
Thermometer & Clamp
Safety Glasses
Ring Stand
PROCEDURE:
1. Fill and pack the beaker with the crushed ice.
2. Place the beaker on top of the hot plate.
3. Make sure that the thermometer is completely surrounded by
ice.
4. Use the stirring rod to keep the ice packed around the bulb
of the thermometer.
5. You will be recording the temperature every minute until told
to stop.
6. Record your data in the data table,
7. Graph these results.
Temperature (0 Celsius)
Effect of Heat on Water
Time
Minute
1
2
3
4
5
6
7
8
Temperature
Minute
9
10
11
12
13
14
15
16
Temperature
Minute
17
18
19
20
21
22
23
24
Temperature
CONCLUSION:
1. What happens to the temperature of the ice while the ice is in the
process of melting?
2. What happens to the temperature of the water while the water is in the
process of boiling?
3. What happens to the heat energy the hot plate puts into the ice while
melting?
4. Since the hot plate is constantly giving off the same amount of heat,
why isn’t your graph a straight line?
5. What is the melting point of ice? Describe what happens on the graph
as the ice is melting.
6. What is the vaporization point of water? Describe what happens on
the graph as water is boiling.
7. Imagine a lake with large chunks of ice floating at the surface. What
will the temperature of the water among the chunks be? Will it be the
same at the bottom of the lake? Explain.