2009/11/8 Jed Rothwell <[email protected]>: > He does not claim excess heat from light water
You mean protium (light hydrogen) I guess. > 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. This is true of any reaction, but only if the reaction is exactly and totally reverted, which wouldn't be the case here for example if some deuterium remained trapped in the lattice (maybe Pd is more deuterium-phile than it is protium-phile, actually I believe this is the case). Or if the Pd lattice was deformed by the loading and deloading sequence. Have these possibilities been considered? Michel
