# The Heating Curve For Water

```Haugen/Yost
Name: __________________________ Date: ______________ Period: _____ Marks ___________
The Heating Curve For Water

Materials
Manager
In charge of
setting up
materials and
holding the
thermometer
during the
experiment.

Timer/Cleanup
Manager
In charge of
timing during
the experiment
and notifying
the recorders of
“time” after
every 30 seconds
have passed.
Also helps with
cleanup.

Recorder 1
In charge of
recording the
temperature
every 30
seconds. Must be
thermometer.

Recorder 2
In charge of
recording the
“description of
water”
observations
every 30
seconds. Is it
ice, liquid,
water, steam or
a combination of
these?
PROBLEM: How does the temperature change if water is heated so that it changes phase from solid to
liquid to gas?
HYPOTHESIS:
MATERIALS:
thermometer, 600 ml beaker, ice, water, hot plate, watch
PROCEDURE:
1. Turn on the hot plate so it can start warming up.
2. Add 150 ml of water and &frac12; cup of ice to the beaker. Place the beaker on the lab bench.
3. Place the thermometer in the mixture. Be careful with the thermometer. Do not let go of it.
Hold it by the string or plastic piece at the top and hold it above the bottom of the beaker for
the entire experiment. Keep the thermometer in the water at all times. Hold it there for 3
minutes before starting observations.
4. After 3 minutes take your first observation. Reset the stopwatch. Label the time for this observation
as 0.0 minutes.
5. Place the beaker on the hotplate. Begin recording the temperature and your observations of the
ice/water every 0.5 minutes (in other words, every 30 seconds) in the observations table. Your
second observation will be at 0.5 minute, your third will be at 1.0 minute, your fourth will be at 1.5
minutes, etc.
6. When the water begins to boil, record the temperature of the water for 3 more minutes, then turn
off the hot plate and clean up your bench.
Haugen/Yost
Name: __________________________ Date: ______________ Period: _____ Marks ___________
OBSERVATIONS/DATA:
1. Data Table for Heating Curve of Water
Time (minutes)
Temperature (C)
0.0
0.5
1.0
1.5
Description of Water
(Is it ice, liquid water, or steam, or a combination of these
phases?)
Haugen/Yost
Name: __________________________ Date: ______________ Period: _____ Marks ___________
2. Graph for Heating Curve of Water – include at the back of your lab report.
DISCUSSION:
A.
Compare the temperature data to the graph on page 52 of your book. Based on this comparison
and what you saw happening during the experiment fill in the numbered blanks.
12
TEMPERATURE (C)
13
6
10
11
7
9
4
1
8
2
5
3
TIME (Heat Energy)
Word Bank:
Condensing
Freezing
Melting
Cooling
Gas
Solid
Cooling
Heating
Liquid
Cooling
Heating
Evaporating
Heating
Haugen/Yost
1.
2.
3.
4.
5.
6.
7.
Name: __________________________ Date: ______________ Period: _____ Marks ___________
8.
9.
10.
11.
12.
13.
B. At which parts of the graph does the addition of heat energy cause an increase in temperature?
C. At which parts of the graph is there no temperature change despite an addition of energy?
What is happening to the water at points where there is no temperature change?
D. Is the change from ice to water a physical or a chemical change? Explain.
```