The table shows measurements for a fixed mass of gas at constant temperature.
| Volume in cm3\mathrm{cm^3}cm3 | Pressure in kPa\mathrm{kPa}kPa |
|---|---|
| 20 | 240 |
| 30 | 160 |
| 40 | 150 |
| 60 | 80 |
One pressure reading is incorrect.
Use p1V1=p2V2p_1V_1=p_2V_2p1V1=p2V2.
Which reading should be changed, and what should its value be?
The reading at 40 cm340\,\mathrm{cm^3}40cm3 should be 120 kPa120\,\mathrm{kPa}120kPa.
The reading at 20 cm320\,\mathrm{cm^3}20cm3 should be 120 kPa120\,\mathrm{kPa}120kPa.
The reading at 30 cm330\,\mathrm{cm^3}30cm3 should be 180 kPa180\,\mathrm{kPa}180kPa.
The reading at 60 cm360\,\mathrm{cm^3}60cm3 should be 100 kPa100\,\mathrm{kPa}100kPa.
108 exam-style questions on Edexcel GCSE Physics 14.3 Gas pressure and temperature, covering 14.3.1 Gas pressure and particle motion, 14.3.2 Temperature and pressure at constant volume, 14.3.3 Absolute zero and the kelvin scale, 14.3.4 Compressing and expanding gases, 14.3.5 Volume and pressure at constant temperature, and 14.3.6 Doing work on a gas. Each one has a worked solution and a mark scheme showing where the marks go.