| 1. |
Decide, as a class, the volume of water (in mL) that will be used for the experiment and record on your data sheet. You can use any volume of water between 250 - 750 mL. All students in the same class must use the same exact volume of water. |
| 2. |
Decide, as a class, the heating device that will be used for the experiment and record on your data sheet. All students in the same class must use the same type of heating device. |
| 3. |
Decide, as a class, the elevation of your classroom (in meters) and record on your data sheet. |
| 4. |
Calibrate each of the thermometers that you will be using for the experiment. Record the results on your data sheet. |
| 5. |
Measure the air temperature in the room (in Celsius) and record on your data sheet. Be sure to include any calibration corrections. |
| 6. |
Measure out the exact volume of distilled water that your class decided on and pour into your container. |
| 7. |
Place a thermometer in the water so that the bulb is several centimeters above the bottom of the container. Do not let the bulb of the thermometer rest on the bottom of the container and do not hold the thermometer in place. You can clamp the thermometer in place or use a rubber band to secure it to a piece of wood that you can place in the water. |
| 8. |
Begin to heat the water. Take temperature readings every 30 seconds and record on your data sheet. |
| 9. |
Continue recording temperature until it remains constant for at least 5 minutes. This is the boiling point. Record the boiling point on your data sheet (Celsius). Be sure to include any calibration corrections. |
| 10. |
Do this experiment on three different days (preferably 3 days in a row) to account for any differences in atmospheric conditions. Please use the same type of heating device and the same volume of water that you had used previously. Record the room temperature and boiling point temperature on your data sheet each day. |
| 11. |
Determine the average room temperature and average boiling point temperature for the 3 days and record on your data sheet. |
| 12. |
Determine the average boiling point based on results from the entire class over the 3 day period. Also determine the class average room temperature for the 3 day period. |
| 13. |
Your teacher will submit your class results to the project web site. Your class results will include:
- Heating device used by class
- Volume of water used by class (mL)
- Elevation (meters)
- Class average room temperature (Celsius)
- Class average boiling point (Celsius)
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