PASCO TD-8596A Ideal Gas Law Apparatus - Manual (Page 10)

Ideal Gas Law Apparatus Model No. TD-8596A
8 ®
Varying Temperature, Sample Data and Analysis
Percent Difference = 1%
Answers to Questions
1. When the cylinder is compressed, the pressure momentarily spikes because the temperature
of the gas increases. As the temperature drops back down, the pressure decreases.
2. The pressure does not return to its original value because volume has decreased while the
molar quantity of gas remains the same.
3. When the pressure is released the temperature drops rapidly, then slowly returns to room
temperature. The temperature drops due to sudden decompression (which is essentially
adiabatic). It returns to room temperature due to heat flow from the environment into the
syringe.
Table 2: Varying Temperature
Volume (cc) Pressure (kPa) Temperature (K)
1 43.6 99.76 301.04
2 23.6 199.22 321.08
P
1
V
1
T
1
------------ 14.4 kPa cc K   =
P
2
V
2
T
2
------------ 14.6 kPa cc K   =