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- From: whitbeck@equinox.unr.edu (Michael Whitbeck)
- Newsgroups: sci.chem
- Subject: Re: Gold dust a fire hazard?
- Message-ID: <4841@equinox.unr.edu>
- Date: 16 Nov 92 18:46:20 GMT
- References: <1e0rf6INNgun@usenet.INS.CWRU.Edu>
- Organization: University of Nevada, Reno
- Lines: 37
-
- In article <1e0rf6INNgun@usenet.INS.CWRU.Edu> ce698@cleveland.Freenet.Edu (A. McPherson) writes:
- >
- >...interesting to confirm
- >the prediction, which is based on fairly well known thermodynamic
- >principles, with a test, just in case we have missed some other
-
- I would like to point out, amidst all the *wild*
- speculation, that the chemical potential of a
- *finely* divided solid differs from that of bulk
- material:
-
- $\mu = \mu_0 + f(S) $
-
- where $\mu_0$ is the bulk chemical potential in
- some standard state and f(S) is a function of
- surface area (and hence particle size).
-
- This of course changes the outcome of any classic
- thermo calculation for $\Delta G$
-
- As for the reactivity of Au metal; sure conc nitric
- is rather ineffective at attacking it-- but try a
- solution of NaCN!
-
-
- Mike W.
-
- ___________________________________________________________
- |Mike Whitbeck | whitbeck@equinox.unr.edu |
- |Desert Research Inst. | whitbeck@wrc.unr.edu |
- |POB 60220 | |
- |RENO, NV 89506 | 702-673-7348 |
- |__________________________|______________________________|
-
- All academics have the potential for being insatiable...
- but the chemists are the most expensive and insatiable among the
- expensive and insatiable. - J. Martin in "To Rise Above Principle"
-