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Thiele tube

Thiele tube - Chemistry Forum

Thiele tube - Chemistry Forum. Discuss chemical reactions, chemistry.


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  #1  
Old 01-07-2004, 07:15 AM
Allan Adler
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Default Thiele tube




Thanks for quoting Thiele's article. If I understand it correctly,
Thiele confirms my impression that the side arm of the tube is narrower
than the test tube part, but differs in his description of how to heat
the tube: he wants you to heat the bend in the side arm, not the bottom
of the test tube. However, his description of the convection currents
agrees with mine to the extent that the hot liquid descends from the
top of the test tube to the bottom. On the other hand, the illustration
in Pavia, Lampman and Kirz, p.496, shows the Thiele tube being heated
from the bottom of the test tube part.

Are both methods of heating the Thiele tube currently used?

Ignorantly,
Allan Adler
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  #2  
Old 01-07-2004, 07:36 AM
Bruce Hamilton
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Allan Adler <[Only registered users see links. ].mit.edu> wrote:


I've never seen anybody heating one from the bottom of the test tube.
The illustrations I recall in Vogel also show heating the near the bottom of
the side arm, and that's how I was taught as well.

The one we used was an inverted P with the side arm slightly smaller diameter,
and reconnecting about halfway up the main tube. The important part was to
ensure the sample and thermometer were just below the upper sidearm re-entry.
However there may be many different versions as people experimented.

Bruce Hamilton
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