Hello. 

Can someone teach me how a chemical reaction translates into potential differential Volts as a battery ?  These chemical reactions / equations for these elements / compounds :

 

Or as for a perhaps simpler case, the well known carbon-zinc vulgar cell yielding 1.5 volts.

5 hours ago, Externet said:

Hello. 

Can someone teach me how a chemical reaction translates into potential differential Volts as a battery ?  These chemical reactions / equations for these elements / compounds :

 

Or as for a perhaps simpler case, the well known carbon-zinc vulgar cell yielding 1.5 volts.

Nernst law

Potontials with positiv voltage minus Potential with more negative voltage gives potential between the two electrodes

 

Here 1 V -(-0.26 V) = 1.26 V

 

 

Zinc -0,763 V  carbon-manganeseoxide +0,975 V

 

0,975V - (-0,763) = 1,738 V

 

Thank you !  Nernst law... will dig into it.

And the figures you show come from an electronegativity table, or from a galvanic series table, the standard electrode potential table, the periodic table, or from other source am not aware of ?

If it is a compound and not an element; how is the potential determined ?  Should I had expected that 1.5V is actually 1.738 V or reverse  instead ?

Edited April 22, 20241 yr by Externet

Because there are some more compounds in the battery like ammonium chloride, the practical voltage is 1,5 V

https://www.azom.com/article.aspx?ArticleID=22363

The voltages can be found in electrical potential tables.

 

 

 

1 hour ago, Externet said:

If it is a compound and not an element; how is the potential determined ? 

Experimentally.