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3B SCIENTIFIC ® PHYSICS
Instruction Sheet
11/08 ALF
1. Safety instructions
•
Avoid going beyond range on pressure meter.
2. Description
Boyle's Law apparatus is used for the experiment-
based determination of the relationship between the
volume and the pressure of a gas (air) at constant
temperature (Boyle's Law).
Boyle's law states that for a given mass of gas (air) at a
constant temperature the product made up of the
volume V and the pressure p is constant:
1
⋅
=
⇒
=
⋅
P
V
k
p
k
V
Boyle's Law Apparatus U30046
The apparatus is essentially a calibrated glass tube
mounted on a white metal plate. The glass tube is
extra strong and additionally protected by a plastic
safety screen. It is connected to an oil reservoir on
which a Bourdon gauge is fitted. By means of a hand
pump coloured oil is gradually pumped from the oil
reservoir into the tube creating over pressure. Whilst
the volume of the trapped is read from a scale clearly
visible at the tube, pressure is measured by a Bourdon
gauge, which reads in Pa x 10
5
1.01325 x 10
Pa). The Bourdon gauge is fitted with a
transparent plastic back to allow students to see its
working parts.
1
1 Calibrated glass tube
2 Metal plate
3 Bourdon gauge
4 Hose connection
5 Oil reservoir
6 Spare oil
7 Base plate
5
. (Standard pressure =
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