Hello DAVID!

On Tuesday June 12 2007 16:43, you wrote to Bj”rn Forsstr”m:

 DW> Did your beer freeze? It seems unlikely, after only 30 minutes in a
 DW> freezer. If the beer and liquor both remained liquid, then freezing
 DW> points are irrelevant.

 DW> The thermal conductivity of glass is far lower than that of aluminum,
 DW> or steel - whatever the cans were made of. Also, the glass wall of a
 DW> bottle is far thicker than the metal wall of a can.

The alternatiove explanation might be that the metal beer can *feels*
colder to the hand than the glass jar, just because of the thermal
conductivity issues. The hand will heat up the surface of the glass. The
beer can OTOH is much more difficult to heat up by the hand because it
conducts well and there is a relatively large heat sink (the beer) behind
it. So it *feels* colder.

The proper way to do the experiment is measure the temperature of the beer
and the liquor with a thermometer.

 DW> I guess you could try putting some liquor into a beer can, and also
 DW> into one of the regular 80 ml jars, and see which sample cools faster.
 DW> I am sure the one in the can will do so. In this experiment, only the
 DW> container is different.

Yep, that is good science, just change one thing at the time.


Cheers, Michiel

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