Science 2010

Lab freezing bath temperatures

Freezing mixtures in the lab are often made from a mixture of either liquid nitrogen or dry ice with a solvent. If using liquid nitrogen this forms a slurry. The viscosity of this slurry is dependent on the solvent or mixture of solvents used. If using dry ice, you generally end up with an equilibrium where a small amount of dry ice is sat in a cold bath of solvent. By varying the solvent used, different temperatures can be achieved.

There has been lots of good work done in the past in determing the temperatures of these baths and there are links for further reading in the references below.

Read more...First published on 9th November 2010 and last modified on 25th June 2011.

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