3b-scientific Linear Expansion Apparatus with Three Pointers Manual de usuario descargar pdf (Pagina 4)

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Subject to technical amendments.

• 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.

• Measure the room temperature T.

• 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

• 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 T in

relation to the room temperature.

The coefficient of linear thermal expansion of

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.

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3b-scientific Linear Expansion Apparatus with Three Pointers Manual de usuario Pagina 4