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Author Topic: KARPEN PILE  (Read 231006 times)

pomodoro

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Re: KARPEN PILE
« Reply #420 on: August 11, 2014, 08:41:49 AM »
My prediction of this karpen oxygen cell is that there will be no voltage difference at all between the dissimilar electrodes when I disconnect the short in hours time . Karpen and Profitis would probably disagree.   

This is an ultra easy experiment almost anyone can do, the electrodes are very inert, the only redox couple existing in equilibrium is 2H2O<-> 4H+  + O2   +4e-. This will have the highest current density on  both electrodes. There is no hydrogen, so the other water redox reaction has no influence.  Its happening on both electodes, oxygen pressure is constant, proton concentration is constant, The kinetics or rate may be different, but the potential by nernst is the same.

Please comment on this, anyone is welcome, before I video tape the event.

profitis

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Re: KARPEN PILE
« Reply #421 on: August 11, 2014, 08:54:21 AM »
Saying that there will be no potential difference after long rest is like saying that there is no potential difference between Pt and carbon pomodoro.let them rest for one hour after disconnection.

pomodoro

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Re: KARPEN PILE
« Reply #422 on: August 11, 2014, 09:56:34 AM »
Saying that there will be no potential difference after long rest is like saying that there is no potential difference between Pt and carbon pomodoro.let them rest for one hour after disconnection.

So you are saying that after letting them for a few hours after the short is removed, you expect a potential difference to develop? Lets be clear about this Profitis,  people need to understand exactly what we are doing and mean by our words.  Thats why I've stated as clearly as possible what I have done in this experiment  There is no conspiracy at work here,  anyone interested needs to replicate these tests for themselves.  Not too hard when just air is needed.

profitis

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Re: KARPEN PILE
« Reply #423 on: August 11, 2014, 11:59:55 AM »
Of course pomodoro.do you think that a anodized carbon rod retains oxygen gas indefinitely? Impossible.the gas diffuses away,electrolyte wets surface.atomic O recombines into O2 and diffuses to where the pressure is alleviated.Its very small v anyway its not importante.leave it for an hour before measurement.

profitis

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Re: KARPEN PILE
« Reply #424 on: August 11, 2014, 12:34:01 PM »
Gas in excess of equilibrium electromigrates(travells) up the cathode to surface.RT/nF ln P1/Psurface

d3x0r

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Re: KARPEN PILE
« Reply #425 on: August 11, 2014, 12:40:39 PM »
Karpen's cell is an intermittant run thing... didn't it have a motor and a switch between two separate cells to allow a relaxation time?
Recently remembered electrets; which like magnets retain a permanent magnetic field, electrets retain a 'quasi-permanent' electric field... but if they're hooked into a circuit, they will instantly dissapate any charge they have, since they are also very high resistance/impedance.


https://www.youtube.com/watch?v=1DR-tTU8uIM
(This is the guy that was experiementing with dry-cells.. of various configurations)


and kinda disrelated; but entertaining; he made a wall of electroscopes :)  But the electroscope he used to measure the electret.
https://www.youtube.com/watch?v=iD6FW8MRUXk
Electrets are often high voltage ultra low current things...


Although.... capacitors are also made with electret-like materials in balances with normal capacitive materials...
https://www.youtube.com/watch?v=K1CjN2I7YeM


But, if they're put through an inductor, for instance, then they would get repolarized oppositely...
they are also referred to as ferroelectric  http://en.wikipedia.org/wiki/Ferroelectricity ; although 'electricity' is a misnomer really.


But; if such a cell could be made, it would have to be applied intermittently to a circuit, like a magnet... thereby requiring external physical work to make it do work...
http://en.wikipedia.org/wiki/Electrophorus  ; uses an electret to apply a charge to a capacitive plate that can then be applied to a circuit for instance...
I dunno...

profitis

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Re: KARPEN PILE
« Reply #426 on: August 11, 2014, 01:16:18 PM »
Yes d3,all karpens are intermittent.a certain amount of time is required to reboot.it was about 1 or 2 seconds between gold and platinum in karpens motor.if you shortcircuit karpens battery for an hour it will need an hour to reboot.the nickel-MnO2-KOH-air karpen in the vid below gives some idea of time required between bursts for a tiny battery.a larger battery will work with much shorter delay

pomodoro

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Re: KARPEN PILE
« Reply #427 on: August 11, 2014, 01:59:08 PM »
Of course pomodoro.do you think that a anodized carbon rod retains oxygen gas indefinitely? Impossible.the gas diffuses away,electrolyte wets surface.atomic O recombines into O2 and diffuses to where the pressure is alleviated.Its very small v anyway its not importante.leave it for an hour before measurement.

I agree but what does it have to do with the current setup?  A Pt electrode at same depth as the C electrode.  No pressure differential exists between them, thus emf is the same on both C and Pt, hence no voltage recorded on the voltmeter.
Do you not agree with this? 
From your previous post I understood that you meant that the Pt itself will have a different potential to the C when dipped in the electrolyte, not due to the oxygen/water reaction, but because of their different elemental makeup?

profitis

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Re: KARPEN PILE
« Reply #428 on: August 11, 2014, 02:18:06 PM »
You can make a karpen with 2 Pt electrodes pomodoro,one blackened,one shiny,one on surface one below surface like I described near the beginning of this thread.you get a perpetual 50microamps/cm2 bursts like that.platinum will adsorb a different quantity of gas than C will straight from air and hence will have different v than C even if both submerged.elemental platinum voltage is different from C's voltage but you will hardly register it(picoamps).you can say that they have electrostatic voltage in this case and will effect O2 potentials via the NEMCA effect(google nemca pt o2)

profitis

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Re: KARPEN PILE
« Reply #429 on: August 11, 2014, 02:35:13 PM »
If your Pt was a little higher above electrolyte you would get somewhat more disparity between electrodes pomodoro.if you add ammonium sulfate you will get still more disparity because then the electrolyte will wet surfaces

pomodoro

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Re: KARPEN PILE
« Reply #430 on: August 11, 2014, 03:05:50 PM »
So as a guess what would you expect the voltmeter to read after I allow the electodes to equilibrate for 7 hours tomorrow?

profitis

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Re: KARPEN PILE
« Reply #431 on: August 11, 2014, 03:10:41 PM »
I have no idea pomodoro but there will be something there.if you had used platinum(black) cathode(touching surface) and etched platinum anode(submerged) I would without a shred of doubt say you are going to get the same voltage tomorrow as today.carbons are dicey and clingy which is why I wanted you to coat with gold.

pomodoro

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Re: KARPEN PILE
« Reply #432 on: August 11, 2014, 03:34:59 PM »
Don't worry, the gold will come. Well I also think there will be some difference, but very small. What if gold was plated what    then?

profitis

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Re: KARPEN PILE
« Reply #433 on: August 11, 2014, 03:49:09 PM »
Lemmeputit2uthisway pomodoro,if your gold is adequately plated or if you use pure gold foil you'l get a voltage which will stubbornly absolutely refuse to go away.make sure you use ammonium sulfate plus sulfuric for wetability if you do this.

pomodoro

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Re: KARPEN PILE
« Reply #434 on: August 11, 2014, 04:00:55 PM »
Now one last grilling profitis, before the gold, I'm going to put this cell under hydrogen, I still think there won't be much voltage difference between electrodes, what do you think?