Em 14/5/2011 18:45, Olin Lathrop escreveu:
> Isaac Marino Bavaresco wrote:
>> 192800C / 1800s =3D 107A (that is, to electrolyze 18g of water it is
>> necessary to apply 107 Amperes during 1/2 hour)
>>
>> Do the rest of the math and you will see that there is no way of
>> getting all that energy back burning just 18g of O2+H2.
> Your conclusion is right, but not for the wrong reaons.  You said to do t=
he
> match, but you obviously didn't.  If you did, you'd realize the units don=
't
> check.  In your first statement you say it takes a minimum charge, but in
> your second statement you talk about energy.  Clearly these two don't mak=
e a
> equation by themselves.

Yes, for the first equation you would need to include the voltage in the
calculation.
What I meant was: How long could you run with 18g of H2+O2? It took a
half hour at more than 100A to get them (which is a substantial current).

Isaac

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