H LV <hveeder...@gmail.com> wrote:

2.5 lbs of powered nickel offers a great deal of surface area for heat of
> adsorption. Also the nickel powder had been sitting in a vacuum before the
> hydrogen gas was added so this would further enhance the adsorption of
> hydrogen.

Yes. This is what I meant by "critical mass issue." Maybe I should call it
"critical thermal mass."

The large mass may also enhance hydrogen adsorption, as noted. In other
words, 100 g of powder might absorb X amount, where 1000 g absorbs more
than 10 times X.

- Jed

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