Victory for the ACT Student Text 15e

L ESSON 2 | R ESEARCH S UMMARY • 313

Experiment 2 The students investigated the change in the volume of a gas at room temperature (294 K) at different pressures using the apparatus shown in Figure 3. A glass tube contained a pure nitrogen gas sample (a), and its volume (in mL) was read from the scale. A column of oil (c) transmitted pressure from the reservoir (b), and the pressure value was read on the gauge (d). Table 1 summarizes the data.

Figure 3

Table 1

40 50 60 70 80 100 120 140 160 180 200

160 128 107 91 80 64 53 46 40 35 32

Pressure, P (kPa)

Gas Volume, V (mL)

Debrief Notice the trend in this chart and think back to the arrows you drew describing Boyle’s and Charles’s laws. Which law (and ƒ””‘™ •‡–Ȍ ϐ‹–• ™‹–Š this information?