Olin Lathrop wrote:
>
> > > Just like gasoline, propane, coal, or any other fuel.
> >
> > Yes, but the AL is AL02/bauxit when come up from earth and need
> > 21.4kW/kg energy
>
> Units of power/mass makes no sense in this context, and I wouldn't call it
> "energy" in any case.

kWh/kg

> All exothermic chemical reactions merely transform the energy stored in one
> set of molecules to somewhat less energy stored in a different set of
> molecules of the same mass, plus some additional energy usually in the form
> of heat.  The energy in the original molecules had to get stored there at
> some time.  In the case of metallic aluminum, in an aluminum manufacturing
> plant.  In the case of coal or crude oil it was stored by conversion of
> sunlight by green plants of long ago.  Both propane and gasoline require
> processing the raw material taken from the earth in a man-made plant, and
> both these processes require energy, just like aluminum.

Well, the the water is also good fuel, just we must separate the
hydrogen from oxygen :). Of course the petrol, gas, need energy for
separate from heavy oil but this much smaller what already contain
before process. The bauxite is not contain any energy, because that
oxidized form of AL.

udv
CSaba

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