Externet Posted April 21 Share Posted April 21 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. Link to comment Share on other sites More sharing options...
chenbeier Posted April 22 Share Posted April 22 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 1 Link to comment Share on other sites More sharing options...
Externet Posted April 22 Author Share Posted April 22 (edited) 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 by Externet Link to comment Share on other sites More sharing options...
chenbeier Posted April 22 Share Posted April 22 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 Link to comment Share on other sites More sharing options...
Sensei Posted April 22 Share Posted April 22 1 hour ago, Externet said: If it is a compound and not an element; how is the potential determined ? Experimentally. Link to comment Share on other sites More sharing options...
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