Heating Curve of Water Activity:
Purpose: The purpose of this lab activity is to investigate the phase change of water by
recording the temperature at different times while heating ice in a beaker.
Materials:
Thermometer Test Tube Clamp Ring Stand
Hot Plate 250-mL Beaker Paper Towels
100-mL Graduated Cylinder Stopwatch
Procedure:
1) Pull of approximately a 30-cm length of paper towel and twist it around the
thermometer just above the 0⁰C mark. Then tighten the test tube clamp around the
paper towel so that the thermometer won’t slip through the paper towel when held up.
2) Using the graduated cylinder, measure out 100 mL of water and place it in the 250-mL
beaker.
3) Measure the temperature of the water and record it in the data table below.
(Remember the proper way to record data. You need to report one pace past the
measurement provided on the device.)
4) Next, assemble the ring stand, hot plate, test tube clamp, and thermometer as
demonstrated by the instructor.
5) Plug in the hot plate and put the beaker of water on the hot plate. Adjust the test tube
clamp so that the bulb of the thermometer is in the middle of the liquid.
6) Start the timer and begin recording the temperature of water every minute for at least
the next 15 minutes.
7) You may stop recording data only after getting three repeating measurements.
Time
Temperature (⁰C)
Time
Temperature (⁰C)
0 min
13 min
1 min
14 min
2 min
15 min
3 min
16 min
4 min
17 min
5 min
18 min
6 min
19 min
7 min
20 min
8 min
21 min
9 min
22 min
10 min
23 min
11 min
24 min
12 min
25 min
