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