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4. Technical data
Dimensions:
Weight:
Sample tubes:
Dimensions:
Tube length:
5. Operation
In order to perform the experiment, the following
equipment is additionally required:
1 Steam generator (230 V, 50/60 Hz) 1001049
or
1 Steam generator (115 V, 50/60 Hz) 1006769
•
Mount the mirror scale onto the base strip.
•
Clamp the pointers below the tubes so as to
facilitate the measurement of thermal ex-
pansion.
•
Calibrate all pointers to zero.
•
Fill half of the steam generator with water,
place it onto the hot plate, insert the cork
cover and fasten it shut with the securing
clamp.
Fig. 1 Experimental set-up
3B Scientific GmbH ▪ Rudorffweg 8 ▪ 21031 Hamburg ▪ Germany ▪
3
830 x 80 x 70 mm
1200 g approx.
Brass, aluminium, glass
700 mm x 6 mm Ø
600 mm
Subject to technical amendments.
© Copyright 2013 3B Scientific GmbH
Connect the thermal expansion apparatus to
•
the steam generator with a hose.
•
Place a dish below the sample tube ends in
order to collect condensed water.
•
Measure the room temperature T.
•
Switch on the hot plate.
•
Allow the steam to flow for some time
through the sample tubes. This should con-
tinue till the tubes have attained a tempera-
ture equal to the boiling point of water
(100°C). Observe the respective pointer de-
flections
•
Read the thermal expansion Δl off the scale
(0.1 mm thermal expansion corresponds to
4 cm pointer deflection on the scale).
•
Calculate the temperature difference ΔT in
relation to the room temperature.
The coefficient of linear thermal expansion α of
different materials can be determined by the
formula:
Δ
l
α
=
⋅
Δ
l
T
where l is the length of the tube measured from
its fixed bearing up to the pilot bearing.
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