3B SCIENTIFIC PHYSICS 8442200 Mode D'emploi page 4

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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.
•
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.
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Measure the room temperature T.
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Switch on the hot plate.
•
Allow the steam to flow for some time through
the sample tubes. This should continue till the
tubes have attained a temperature equal to
the boiling point of water (100°C). Observe the
respective pointer deflections
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•
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The coefficient of linear thermal expansion
different materials can be determined by the for-
mula:
α
where l is the length of the tube measured from its
fixed bearing up to the pilot bearing.
Subject to technical amendments.
Read the thermal expansion l off the scale
(1 mm thermal expansion corresponds to 4 cm
pointer deflection on the scale).
Calculate the temperature difference
relation to the room temperature.
∆ l
=
l ⋅ ∆ T
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T in
of