A student investigates four gas samples: W, X, Y, and Z.
Look at her measurements:
| Gas | Pressure (Pa) | Volume (m3\text{m}^3m3) |
|---|---|---|
| W | 10 | 0.5 |
| X | 15 | 0.4 |
| Y | 30 | 0.2 |
| Z | 50 | 0.15 |
Two readings are for the same mass of the same gas at a constant temperature.
Which two readings are for the same mass of the same gas at a constant temperature?
Use calculations in your answer.
The student investigates another gas kept at a constant volume.
Explain, using ideas about particles, how decreasing the temperature affects the pressure of the gas.
Calculate the pressure at the bottom of a 0.6 m0.6\text{ m}0.6 m tall column of a liquid with a density of 1200 kg/m31200\text{ kg/m}^31200 kg/m3.
(Take the gravitational field strength, g=9.8 N/kgg = 9.8\text{ N/kg}g=9.8 N/kg.)