PASCO TD-8595 Absolute Zero Apparatus - Manual (Page 7)

Absolute Zero Apparatus Model No. TD-8595
6 ®
Suggested Experiments
Experiment I: Determining Absolute Zero while Keeping the Number of Gas Moles
(n) Constant.
Procedure:
1. Start with the water as hot as possible.
2. Connect the hose fitting from the Absolute Zero Apparatus
to the Pressure Sensor. Connect the stereo plug from the
apparatus to the Temperature Sensor.
3. Set up your experiment in DataStudio (See Appendix B for
setup instructions.) In DataStudio, open a Digits display and
a temperature vs. pressure graph. Click the Start button.
4. Place the sphere of the apparatus in the water bath, and keep
the sphere completely submerged.
5. Watch the Digits display of temperature. When the display
stops changing (in the hundredths place), click on the Keep
button. Do not stop recording.
6. Cool the water bath by adding cold water or some ice cubes. When the container becomes
too full, dump out some of the water, but always have enough water to keep the apparatus
completely submerged. Cool the bath by about 10
o
C, and repeat step (4).
7. Repeat steps 4 through 6, for temperatures down as low as you can go, and then click on
the Stop button to end recording.
8. In the Graph display, click on the Fit button and select a linear curve fit. The y-intercept is
your value for absolute zero.
Equipment required:
Absolute Zero Sphere (TD-8595) One bucket of hot water, one bucket of cold
water, ice
Absolute Pressure Sensor
(PS-2107) or (CI-6532A) DataStudio software (version 1.7or later)
Temperature Sensor (PS-2125) or
Thermistor Sensor (CI-6527A) Steam Generator (TD-8556) or Hot Plate
(SE-8767)
Figure 1-1: Experiment
Set up