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Re: [Phys-l] How much energy can a battery discharge

1. But amp-hours is not a measure of energy.
2. Batteries contain reactive molecules, so you can not count 1
3. Batteries contain non reactive substances so you can not count all
molecules. For example water used to carry the chemicals may not
participate in the reaction.
4. At least 2 different atoms or molecules are needed for a reaction, so
the number of participating electrons is reduced even more.
5. Does the reaction involve only hydrogen? If it involves O16 then you
can only count about 2 electrons/ 16amu. Oxygen only accepts two electrons.
Only the outer valence electrons participate in the reaction, and the inner
ones remain tightly bound.
6. Beyond these simple ideas there are a number of other practical

You need to know the details!

John M. Clement
Houston, TX

-----Original Message-----
From: [mailto:phys-l-] On Behalf Of paul beach
Sent: Thursday, October 23, 2008 11:02 PM
Subject: [Phys-l] How much energy can a battery discharge

How much energy can a Battery Hold? Can I just divide grams-moles by

1 Coulumb = 6.2 x 10^18 electrons or 1 A / sec
Avogadro's number = 6.02 x 10^23 gram-moles

Coulumbs for a gram-mole = 6.02*10^23 / (6.2*10^18)
= 97096.77419

Divide by 60*60 to get amp hours = 26.97132616

Therefore something the size or mass of a sugar cube, could give about
27 amp hours on the negative terminal.
paul beach

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