Living organisms and thermodynamics (Pentcho Valev)

Jonathan B. Marder marder at agri.huji.ac.il
Wed Oct 22 04:27:22 EST 1997


RUMYM+AEA-BGEARN.ACAD.BG wrote in message +ADw-62kdd3+ACQ-4lh+AEA-mserv1.dl.ac.uk+AD4-...
...
+AD4-Bryant Fujimoto wrote:
...
BF+AD4-1. a potassium atom at the right electrode is oxidized, releasing a
BF+AD4-K ion to the solution on the right and an electron in the electrode.
BF+AD4-2. The electron flows to the left electrode where it reduces a K,
thus
BF+AD4-consuming a K from the left solution.      ...
+ADw-

Pentcho,
  This doesn't quite close the problem. You said you wanted to know
the POTENTIAL difference between the electrodes. If you measure this
with an ideal voltmeter (infinite resistance) then the electrochemistry
can't actually happen (i.e. it stays +ACI-potential+ACI-) and you will record
the appropriate voltage.

Jonathan B. Marder   +ADw-MARDER+AEA-agri.huji.ac.il+AD4-
Department of Agricultural Botany, The Hebrew University of Jerusalem
Faculty of Agriculture, P.O.Box 12, Rehovot 76100, ISRAEL
Phone: +-972 8 9481918   Fax:   +-972 8 9467763
Web page:    http://www.agri.huji.ac.il/+AH4-marder





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