# Idl]]] Kdfgneg Kgslegj Esklrgnl Idk Kk Idkkk

630 words - 3 pages

Experiment: To Verify Boyle’s Law
Materials used: A Boyle’s Law Apparatus, Air Pump, Hand Vacuum
Pump.
Method:
1) Set up apparatus as shown in the diagram.
2) Connect air pump to the in let of the oil reservoir.
3) Open air tap and pump in air until pressure gauge reads its max value.
4) Quickly close tap.
5) Leave for a minute or two, after changing the pressure of the trapped air wait a minute or two before reading the pressure or volume, to allow the air to reach room temperature. This is necessary because when the air is compressed or expanded there may be slight changes in temperature.
6) Then measure the gas pressure by reading it off the Bourdon gauge. Record these volumes.
7) Read the volume of gas off the scale next to the glass tube.
8) Gently open then quickly close tap to release some air.
9) Leave for a minute or two, then measure the gas pressure by reading it off the Bourdon gauge.
10) Record these values.
11) Repeat steps 7-9 at least six times until the pressure of the gas is
back to atmospheric pressure
12) Plot a graph of pressure (p) against the inverse of volume (1/V)
Results:
The graph is a straight line through the origin, verifying that the pressure (p) is proportional to (1/V), verifying Boyles Law. Also all values of pV are the same.
P α 1/V
therefore p=k(1/V)
therefore pV=k
Results:
Pressure
p/ atms
Volume
V/cm3
1
Volume /cm-3
120
9.0
0.11
180
6.0
0.17
220
5.0
0.20
280
4.0
0.25
320
3.5
0.29
380
3.0
0.33
440
2.5
0.40
(Based on 2003 figures given)
pV=k
To graph p against 1/V
Boyles Law States……. That at constant temperature the volume of a fixed mass of gas is inversely proportional to its pressure.
P α 1/V
This proves Boyles law...

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