Verification of Boyle's Law
When a fixed mass of gas (at constant temperature) is subjected to increased pressure the volume of the gas is reduced. In this experiment we investigate the relationship between pressure and volume.
- Press the "Pump" button until the pressure is at its maximum value.
- Record the pressure and the volume (in cm3) readings.
- Press the "Release Pressure" button. The pressure will reduce by some random amount.
- Wait, and again record pressure and volume.
- Repeat until you have at least six readings. Repump if necessary
- Using graph paper, draw a graph of pressure (y-axis) against 1 / volume.
Note: Start both axes at zero.
- Draw a "best fit" straight line. A straight line through the origin shows that pressure and volume are inversely proportional to each other.
All Physics Experiments
- Wait for temperature (and therefore volume) to stabalise after each pressure change before you read the volume
- Have your eye level with the oil when taking volume readings to avoid parallax errors
- Try to ensure that the room temperature remains constant throughout the experiment, otherwise volume varies.