home *** CD-ROM | disk | FTP | other *** search
- Path: sparky!uunet!haven.umd.edu!darwin.sura.net!wupost!uwm.edu!ogicse!das-news.harvard.edu!cantaloupe.srv.cs.cmu.edu!crabapple.srv.cs.cmu.edu!andrew.cmu.edu!pk03+
- From: pk03+@andrew.cmu.edu (Paul Karol)
- Newsgroups: sci.physics.fusion
- Subject: Re: Why Ying?
- Message-ID: <MePjNuS00WBME3xIw9@andrew.cmu.edu>
- Date: 23 Jul 92 10:12:10 GMT
- Article-I.D.: andrew.MePjNuS00WBME3xIw9
- Organization: Carnegie Mellon, Pittsburgh, PA
- Lines: 15
- In-Reply-To: <1992Jul23.182537.1@cc.newcastle.edu.au>
-
- I think Dieter Britz is confusing macroscopic thermodynamics with
- microscopic kinetics when he invokes Le Chatlier's principle to question
- how the input of gamma irradiation affects the D + D --> He-4 + gamma
- reaction. In microscopic reaction rate theory, before we can talk about
- Le Chatlier's principle and equilibrium, we have to say something about
- the reverse elementary reaction, He-4 + gamma --> D + D. When we know
- the relative rates of each of these steps, we have an equilibrium
- constant. But suppose the rate of that latter step is zero, i.e. that
- it does not occur. You have an irreversible reaction, no 'equilibrium',
- and no place for Le Chatlier's principle. Or, if you add aluminum
- powder to a solution of copper, metallic copper will form and the
- aluminum will dissolve. You can't get metallic aluminum back by adding
- more product copper metal.
-
- PJK
-