# Activity C03: Heat Of Fusion

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Activity C03: Heat Of Fusion
Activity C03: Heat of Fusion for Ice
(Temperature Sensor)

|Concept |DataStudio |ScienceWorkshop (Mac) |ScienceWorkshop (Win) |
|Phase change |C03 Heat of Fusion.DS |C03 Heat of Fusion |C03_ICET.SWS |

|Equipment Needed |Qty |Equipment Needed |Qty |
|Temperature Sensor (CI-6505A) |1 |Tongs |1 |
|Balance (SE-8723) |1 |Protective gear
| | | |

For You To Do

In this activity you will observe ice melting in both a qualitative and a quantitative manner.

In the first part of the activity, observe a phase change for ice while measuring the temperature of the system. Use the Temperature Sensor to measure the temperature of a container of ice as small amounts of warm water are added to the ice. Use DataStudio or ScienceWorkshop to record and display the temperature data.

What kind of energy transfer (loss or gain) occurs when ice melts?

In the second part of the activity, use the Temperature Sensor to measure the temperature change while ice melts in warm water. Use DataStudio or ScienceWorkshop to record and display the temperature data. Measure the amount of ice that melts. Use your measurements of the change in temperature and the amount of ice that melted to calculate the Heat of Fusion for ice. Compare your calculation for the Heat of Fusion for ice to the accepted value for the Heat of Fusion.

PART I: Computer Setup

1. Connect the ScienceWorkshop interface to the computer, turn on the interface, and turn on the
Use the Temperature Sensor to measure the initial temperature of the ice. Measure and record the temperature.

Hint: Use a Digits display and ‘Monitor Data’ in DataStudio or ‘Monitor’ in ScienceWorkshop to see the temperature of the ice.

What do think the temperature of the ice will be?

2. Prepare a container of hot water. Use the Temperature Sensor to measure the initial temperature of the hot water. Measure and record the temperature.

Hot water at 40 ‘C will work just fine. Cooler temperature water may lack the heat necessary to melt the entire ice sample.

3. Add 30 mL of hot water (40˚ C or above) to the ice while stirring the ice/water mixture. Measure and record the temperature.

Is the ice/water mixture warmer, cooler or the same temperature as the initial temperature of the hot water?

If the hot water cooled down, where did its heat energy go?

4. Add another 30 mL of hot water while stirring. Measure and record the temperature.

Carefully observe the mixture and note if there is any remaining ice in the container.

5. Continue to add 30-mL quantities of hot water until all of the ice is melted. Measure and record the temperature of the final

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