quentron.com

[profitis]

@sarkeizen apologies sir,go to www.chem.queensu.ca/people/faculty/mombourquette/chem221/8_equilibrium/electrochem.asp scroller down to 'electrode concentration cell'.oxygen gas is the species in solid solution inside of the karpenquenco.

[lumen]

Gibbs energy?

[profitis]

@lumen theltaG=  -nFE  where nF is faradays constant and E is the cell potential.   

[sarkeizen]

@sarkeizen apologies sir,go to www.chem.queensu.ca/people/faculty/mombourquette/chem221/8_equilibrium/electrochem.asp scroller down to 'electrode concentration cell'.oxygen gas is the species in solid solution inside of the karpenquenco.

According to the quote: "consists of an anode and a cathode half cell that contain the same chemical species but where the concentration of the species in the electrode is different on one than in the other, for example, a solid solution containing the chemical species."

So the electrode in a electrode concentration cell is made of the species.  Are you saying that the gold and platinum electrodes in the KP contain oxygen?

[profitis]

@sarkeizen affirmative.O2 adsorbs directly onto the gold and platinum surfaces like a sponge to different degrees.even if they were to adsorb to the same degree by volume their heats of adsorption differ and thus their thermodynamic enthalpies differ leading to different activities (a) of the adsorbed species.the more rigorous form of the cell potential becomes RT/nF ln aO2 A/aO2 B.