Galvanic Cells and Electric Potential

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Discussion Overview

The discussion revolves around the nature of electric potential in galvanic cells and batteries, specifically addressing the concept of electromotive force (EMF) and the role of chemical reactions in charge separation and energy storage. The scope includes theoretical and conceptual aspects of electrochemistry and electric potential.

Discussion Character

  • Conceptual clarification
  • Debate/contested

Main Points Raised

  • One participant questions whether the electric potential in a galvanic cell is analogous to that in a capacitor, prompting a discussion about the definition and implications of EMF.
  • Another participant explains that EMF is related to electric potential and discusses the meaning of "motive" in the context of physics, suggesting that it represents a scalar field rather than a vector force.
  • A participant mentions that batteries store potential energy in a chemical form, implying that chemical reactions contribute to charge separation and energy storage.
  • Another participant expresses uncertainty about the role of chemicals, suggesting that the electric potential may be viewed as a normal electric potential regardless of the chemical processes involved.

Areas of Agreement / Disagreement

Participants express differing views on the relationship between electric potential, EMF, and the role of chemical reactions in batteries. There is no consensus on these points, and the discussion remains unresolved.

Contextual Notes

Participants have not fully explored the assumptions underlying their claims about the nature of electric potential and the role of chemical reactions, leaving some aspects of the discussion open to interpretation.

tonyjk
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Hello,

In a battery or a galvanic cell, the electric potential of the battery is due to a difference of charges between the two cells like in a capacitor? if yes, why we call it electromotive force of a battery (EMF) ?

Thank you.
 
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Here's why:
E: As you said, it is the ELECTRIC potential.
M: Look up the definition of motive. It has a use in physics too.
F: Although it is not the typical "force" that you think of (a force represented by a vector field), it is a force, just one represented by a scalar field.
Does this answer your question?
 
Isaac0427 said:
Here's why:
E: As you said, it is the ELECTRIC potential.
M: Look up the definition of motive. It has a use in physics too.
F: Although it is not the typical "force" that you think of (a force represented by a vector field), it is a force, just one represented by a scalar field.
Does this answer your question?

Hello Isaac,

I read that the battery stores its potential energy in a chemical form. It means that the chemical reaction in both cells is creating the separation of charges thus storing or creating potential energy?
 
tonyjk said:
Hello Isaac,

I read that the battery stores its potential energy in a chemical form. It means that the chemical reaction in both cells is creating the separation of charges thus storing or creating potential energy?
I believe so. However, the scalar field, to my understanding, is measuring the potential energy of the interaction in volts. I am not an expert on bateries, however I believe it is just a normal electric potential, and in that sense it doesn't mater if chemicals do or don't play a role.
 

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