Pasco TD-8561 THERMAL CONDUCTIVITY APPARATUS Manuel d'utilisateur télécharger pdf (Page 7)

012-03349D Thermal Conductivity Apparatus

EQUIPMENT NEEDED:

— Steam generator that will deliver approxi-

mately 10 grams/minute (e.g., PASCO’s

Model TD-8556 Steam Generator)

— Freezer

— Container to collect melted ice (a paper

cup is fine)

Experiment: Measuring Thermal Conductivity

— Gram balance to weigh collected water

(you could collect the water in a graduated

flask, but your results will be less accurate)

— Container to collect condensed steam

— Grease such as petroleum jelly

("Vaseline")

Measuring Thermal Conductivity

➀ Fill the ice mold with water and freeze it. Do not freeze water with lid on jar. (A few drops of

a non-sudsing detergent in the water before freezing will help the water to flow more freely

as it melts and will not significantly effect the results.)

➁ Run jar under warm water to loosen the ice in the mold.

➤ NOTE: Do not attempt to “pry” the ice out of the mold.

➂ Measure and record h, the thickness of the sample material.

Mount the sample material onto the steam chamber as shown in Figure 2.

➤ NOTE: Take care that the sample material is flush against the water channel, so water will

not leak, then tighten the thumbscrews. A bit of grease between the channel and the sample

will help create a good seal.

➄ Measure the diameter of the ice block. Record this value as d

. Place the ice on top of the

sample as shown in Figure 2. Do not remove the ice but make sure that the ice can move

freely in the mold. Just place the open end of the mold against the sample, and let the ice

slide out as the experiment proceeds.

Container for collecting

melted ice

Material

sample

Steam

Generator

Figure 2 Experimental Setup

Water channel

Clamps

(Top View)

Ice in Mold with bare ice

against material sample

Container for collecting

condensed steam

➃

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Pasco TD-8561 THERMAL CONDUCTIVITY APPARATUS Manuel d'utilisateur Page 7

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