Michel Jullian writes: > > ----- Original Message ----- > From: "Frederick Sparber" <[EMAIL PROTECTED]> > To: <[email protected]> > Sent: Tuesday, May 16, 2006 4:54 PM > Subject: Re: Helmholtz Layer Metal-Water Interface, Joe Cell Etc > > > > Michel Jullian wrote: > >> > >> I don't know what you're after Fred (power from surface effects? All I > >> can > >> do is confirm the e-field calculation, it's 0.5GV/m all right :) but the > >> quotes are interesting! > >> > > I'm after that ~ 80,000 joule/mole Spontaneous Free Energy in the > > Autoionization of Water > > ( 0.83 eV per H-OH bond, 2 H2O <---> H3O+ + OH -) > > Fred do you mean the following? (H3O+ is the aqueous solute of H+ isn't it? > My chemistry courses are awfully far away :) > --------- > H2O(l) -> OH-(aq) + H+(aq) - 55.836 kJ/mol (endothermic) > Reverse reaction spontaneous at 25°C. No equilibrium temperature. >-------- > If it is then it's about 60kJ/mol but absorbed, not produced, and it only > occurs in a marginal way (not spontaneous at any temperature) > http://chimge.unil.ch/En/ph/1ph4.htm
"2 H2O <---> H3O + + OH- delta G = 79,900 joule/mole" In running closed cell Conductivity-Resistivity tests of water with inert electrodes the values stay constant, Michel. :-) Fred
