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

["Michael Edmiston" <edmiston@bluffton.edu>]

Without thinking about the calculations, I can tell you that your result is 
a lot different than reality.  A typical Nickel-Metal-Hydride rechargeable 
AA cell (which is considerably more energy than a AA alkaline cell) is about 
2 amp hours, and it is perhaps as big as 5 sugar cubes.  Therefore, your 
result is off by at least 50-fold.

Michael D. Edmiston, Ph.D.
Professor of Chemistry and Physics
Bluffton University
1 University Drive
Bluffton, OH 45817
419.358.3270
edmiston@bluffton.edu


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From: "paul beach" <sniffyraven@fastmail.fm>
Sent: Friday, October 24, 2008 12:01 AM
To: <phys-l@carnot.physics.buffalo.edu>
Subject: [Phys-l] How much energy can a battery discharge

> How much energy can a Battery Hold? Can I just divide grams-moles by
> Coulumbs?
>
> 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
>  sniffyraven@fastmail.fm
>
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