PASCO TD-8596A Ideal Gas Law Apparatus - Manual (Page 4)

Ideal Gas Law Apparatus Model No. TD-8596A
2 ®
(*See the PASCO catalog or web site for more information.)
Introduction
The Ideal Gas Law Syringe allows simultaneous measurements of temperature and pressure of a
gas as it is compressed. A low thermal mass thermistor is built into the end of the syringe to
measure temperature changes inside the syringe. The response time is around a half of a second.
The plunger is equipped with a mechanical stop that protects the thermistor, and also allows for a
quick, predetermined change in volume. The temperature connector, a mini stereo jack, connects
directly to a temperature sensor, and the pressure connector, a quick-release connector, attachs
directly to a pressure sensor. As the plunger of the syringe is depressed, the volume decreases
while pressure and temperature increase.
Equipment Setup
Plug the mini stereo jack into the temperature sensor. Connect the quick-release
connector to the pressure port as shown. This white plastic connector can be
disconnected and re-connected during the experiment to allow for different initial
plunger positions.
Procedure
Set the plunger for a volume of 40 cc.
Hold the base of the syringe firmly against a sturdy
horizontal surface.
Slap down on the plunger with the palm of your hand to
fully compress the gas inside the syrinnge. Hold this
position until the temperature and pressure have
equalized and are no longer changing (about 30
seconds).
Release the plunger and allow it to return on its own. (It
may not go back to 40 cc.)
NOTE: Do not use a hammer or mallet on the plunger!
Only use the palm of your hand to push the plunger
down.
Additional Equipment Required or Recommended (*) Model Number
PASPORT interface*
Pressure/Temp sensor or PS-2146 or
Pressure sensor and Temperature sensor PS-2125 and PS-2107
(*) PASPORT extension cable PS-2500