Table 1.1 shows readings from an experiment where a fixed mass of gas is kept at constant temperature while its volume is changed. Volume / cm3 Pressure / k...
Question 1 Report
Table 1.1 shows readings from an experiment where a fixed mass of gas is kept at constant temperature while its volume is changed.
| Volume / cm3 | Pressure / kPa | pV / kPa cm3 |
|---|---|---|
| 100 | 200 | 20 000 |
| 80 | 250 | 20 000 |
| 50 | 400 | 20 000 |
| 25 | 800 | 20 000 |
Which conclusion is best supported by Table 1.1?
Answer Details
The table shows that for every pair of volume and pressure readings, the product \(pV\) comes out to the same value, 20 000 kPa cm³, even though the individual pressure and volume readings change considerably (from 100 cm³/200 kPa up to 25 cm³/800 kPa).
This constant product is the defining feature of Boyle's law: for a fixed mass of gas at constant temperature, pressure is inversely proportional to volume, so that \(pV\) remains constant as one increases while the other decreases. The conclusion best supported by the table is that pressure and volume are inversely proportional at constant temperature.
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