Boyle's Law Apparatus
Description of Boyle's Law Apparatus
The bench-mounting equipment includes a back plate that holds two clear-walled cylinders containing oil (supplied). Students use hand-operated pumps (supplied) to increase or decrease the pressure in the left-hand cylinder (the Reservoir) which moves a â€˜liquid pistonâ€™ of oil in the right- hand cylinder (the test cylinder). This piston compresses or decompresses a trapped column of air in the test cylinder.
The equipment uses normal, clean, dry air, as it behaves as an ideal gas over the range of pressures used in this equipment.
A digital indicator measures the change in height of the trapped air column. When multiplied by the cross-sectional area of the column, this gives the change in volume. A mechanical pressure gauge measures the pressure of the trapped air.