Making Charles Law tubes
These tubes allow the demonstration of Charles' law in a school lab.
Heat the tube in boiling water, drying oven or with a hot air gun and
place open end in clean mercury. Allow tube and the air in it to cool,
drawing a thread of mercury about 5mm long up into the tube. Allow all to
cool to room temp. To move the thread of mercury further down the tube, to ensure it is not expelled when the tube is heated to 100°C during the
experiment, pass a short length of nylon fishing line (approx 0.5mm diam)
down the tube and through the mercury. This allows the air below the
mercury to leak out around the line and when the mercury has fallen to the
required position, remove the nylon line.
See also: Law of Charles and Gay-Lussac, Constructing school science lab equipment
Referenced By
Constructing Equipment | Constructing school science lab equipment
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