Do galvanic cells depend on distance?

In summary: This is because there's an infinite mutual repulsion between the oppositely charged metal plates, regardless of the surface area.
  • #1
Biker
416
52
I have seen some sites say that it doesn't and other says the opposite. So let's see
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Source of the pic: Chemguide

Lets look at the hydrogen (Oxidation) half cell. If we assume that it contributes x volts until the electron reachs the copper, then no matter how big is the distance the voltage is going to be the same ( only the Electric field will be weak and the current will decrease)

However if we look at both cells together and try to move the copper away from the hydrogen and look at the contribution of the copper electrode, First opposing the current, by exerting a force in the other direction. So when you move it away, you are making the potential of the electrons in the platinum decrease.
So if we assume that the voltage at the copper electrode ( without the contribution of hydrogen) is y and the voltage at the hydrogen is z at the initial state then you move it away z will decrease so the difference will increase thus opposing the current moreIs this a explanation true?
 
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  • #2
Any answer?
 
  • #3
Biker said:
However if we look at both cells together and try to move the copper away from the hydrogen and look at the contribution of the copper electrode, First opposing the current, by exerting a force in the other direction. So when you move it away, you are making the potential of the electrons in the platinum decrease.
These are electrodes immersed in liquid electrolyte, and you're envisioning a tiny electrostatic repulsion between the plates due to the charges on each? I don't think that comes into the picture, but we'll see if someone can set you right.
 
  • #4
NascentOxygen said:
These are electrodes immersed in liquid electrolyte, and you're envisioning a tiny electrostatic repulsion between the plates due to the charges on each? I don't think that comes into the picture, but we'll see if someone can set you right.
Nvm, Anyone who is reading this thread. I already figured it out

Thanks NascentOxygen
 
Last edited:
  • #5
Even if you make the surface area of each electrode 100 times greater, a galvanic cell's voltage doesn't change.
 

Related to Do galvanic cells depend on distance?

1. How does the distance between the electrodes affect the performance of a galvanic cell?

The distance between the electrodes in a galvanic cell can significantly impact its performance. The closer the electrodes are to each other, the higher the rate of electron transfer between them, resulting in a stronger and more efficient cell. Conversely, a larger distance between the electrodes can decrease the rate of electron transfer, leading to a weaker and less efficient cell.

2. Can galvanic cells work without any distance between the electrodes?

No, galvanic cells require a distance between the electrodes to function. The distance allows for the flow of electrons from the anode to the cathode, which creates the electrical current in the cell. Without any distance between the electrodes, there would be no flow of electrons and the cell would not work.

3. Is there an optimal distance between the electrodes for a galvanic cell?

Yes, there is an optimal distance between the electrodes for a galvanic cell. This distance varies depending on the specific cell and its components, but it is typically determined through experimentation and is often the distance at which the cell produces the highest voltage and most efficient performance.

4. How does the distance between the electrodes affect the voltage of a galvanic cell?

The distance between the electrodes has a direct impact on the voltage of a galvanic cell. As the distance increases, the voltage of the cell decreases due to the decrease in electron transfer rate. Conversely, as the distance decreases, the voltage of the cell increases due to the increase in electron transfer rate.

5. Can changing the distance between the electrodes affect the lifespan of a galvanic cell?

Yes, changing the distance between the electrodes can affect the lifespan of a galvanic cell. If the electrodes are too close together, the cell may experience a higher rate of corrosion, leading to a shorter lifespan. On the other hand, if the electrodes are too far apart, the cell may have a lower voltage and weaker performance, potentially reducing its overall lifespan.

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