Re: pinhole sublimation

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From: NFetter@aol.com
Date: Mon Dec 04 2000 - 22:39:06 PST 

From: NFetter@aol.com
Message-ID: <4e.e3d58d8.275de78a@aol.com>
Date: Tue, 5 Dec 2000 01:39:06 EST
Subject: Re: pinhole sublimation

HI Geoff,
If you look at the experimental phase diagram for carbon dioxide, the only
transition permissable at ambient conditions is between solid and gas phases.
As to why this is true probably hinges on the difference in binding energies
of the solid lattice and the intermolecular forces of the liquid phase. For
carbon dioxide higher pressures and lower temperatures will permit the
formation of a liquid phase, but I don't know of any theoretical way to
construct a phase diagram from lattice energy and intermolecular force data.
Neil Fetter

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