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Casio EA200 Manual

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English
Activity: Operating the EquipmentActivity: Operating the Equipment
MeasurementMeasurement
2-4-2
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Other Things To Do
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í Measuring Data
u The water temperature is displayed on the calculator.
u Read the volume of the gas using the markings on the syringe and
read temperature at that time, which is displayed on the calculator.
u Add a little of the cold water to the water in the container, and mix. After waiting a few
minutes, take readings of the volume and temperature.
u Repeat this step until the temperature of the water in the container approaches the
temperature of the cold water.
u Repeat the above steps, adding ice instead of cold water and taking readings.
u Graph the readings, which produces a graph that is virtually linear.
u Substitute two of the values on the graph into the expression, and calculate the
temperature where volume becomes zero.
í Calculator Operation
u Use the Temperature Measurement Setup to measure the temperature and then display it.
u Find the applicable program in the Program Library (P.2-16-1), input it into your calculator,
and then run it.
1 Te mperature Probe
2 Mixing Stick
3 Syringe
4 Warm Water
5 Reading Position
1 Cold Water
2 Mixing Stick
u See if you can approximate a linear graph where a large number of measured
values (plots) pass the point at –273°C (absolute zero).
u Consider why observed values are scattered around a straight line.
u Try repeating the above steps with the syringe filled with another type of gas
(helium, oxygen, etc.).
1 Ice
2 Mixing Stick
Should the plastic container become too full during the above steps, it is all right to remove some
of the water. However, make sure that the syringe remains under the surface of the water.
V = T + V
0
V
1
–
V
0
T
1
T = –
V
0
T
1
V
1
–
V
0
… 21 …


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