*Kidwell* does not what?
At 10:38 AM 11/8/2009, you wrote:
Steven Krivit wrote:
I need to have
another look at Kitamura's claims about light water. I didn't get that
they claim excess heat. Kidwell does not.
Kidwell does not what?
He does not claim excess heat from light water, except chemical heat. He
shows that it is chemical because it is completely reversible. That is, it
is exothermic while loading and endothermic while deloading, and heat
balances exactly. I do not think previous studies could have demonstrated
this so convincingly. That's the beauty of a microcalorimeter.
When I wrote this previously Ed Storms cautioned me to add that not all
chemical reactions are reversible. Combustion, for example, is not. You
cannot run it backwards in an electrochemical cell. (You can in an algae
cell doing photosynthesis! Ha, ha.) But the heat of formation of a hydride
is reversible, which is fortunate for this experiment. You don't have to
know exactly how highly loaded it is. You do not have to know exactly how
much chemical heat it should produce, which may not even be in the
chemistry reference books. You need only show a balance.
Scott Little has nice calorimeters. Not micro-calorimeters, but accurate.
He showed an elegant demonstration with a reversible chemical reaction:
charging and discharging a rechargable battery. It was endothermic
charging up, and exothermic discharging inside the cell through a Joule
heater, and it balanced up nicely.
- Jed
