From: Jed Rothwell
A phase change -- from meaning from gas to liquid, or liquid
to solid -- can change the rate of cooling but it cannot make it anything
other than a monotonic decrease as far as I know.Since you do not know - then why comment at all? When you persist in such continuing levels of disinformation, it does not inspire confidence in your other pronouncements, many of which are in areas where you do have expertise. Not in thermodynamics - apparently. "Recalescence" can be a deadly phenomenon in some situations. It is a sudden burst of heat during cooling. In fact, recalescence is the prototypical version of "heat after death". The death toll in steel mills - due to recalescence - is likely to be in the thousands, over the centuries, including an in-law. The surge of energy can be massive. It hard to understand how anyone in LENR manages to remain completely ignorant of the latent energy of phase-transitions in metals, since they can be at the heart of the causative phenomena. The "trigger temperature" of Ni-H is just such a transitions, which does not involve gas, solid or liquid phases. Ref: The American Heritage(r) Dictionary of the English Language: Fourth Edition. 2000. "Recalescence": A sudden glowing in a cooling metal caused by liberation of the latent heat of transformation. The energy surge is in the range of chemical, but in a counter-intuitively way, this energy is instigated by cooling. The short time frame for dumping large amount of latent heat can make the energy transfer appear to be greater than it is. In the context of "heat after death" with deuterium cells - a sudden thermal surge in the electrodes, due to recalescence can in fact be the cause of the recurrence of the same nuclear reactions which were effectively quenched - when the electrical power was cut. Thus a persistence of heat continues for an extended period due to both phase transitions and induced nuclear reactions. As with normal recalescence, and in a counter-intuitively way, this energy release is instigated by cooling. It is not coincidental that Celani recently reports the same endothermic periods which Ahern reported last year. Jones BTW - it turns out that a few housewives are familiar with a minimal version of recalescence. If a cook removes a hot cast iron skillet from the stove with a dish-cloth over the hot handle, and places the hot skillet immediately under the tap, so that it is rapidly water-cooled, there can be a sudden surge of heat due to recalescence - which makes the handle much hotter than before... you may not have realized she was capable of that level of profanity. FWIW - here are a baker's dozen of phase transitions, not involving the simple solid, liquid, and gaseous phases (from Wiki) some of which are quite energetic 1) Eutectic transformation, 2) Peritectic transformation, 3) Spinodal decomposition 4) Transition to a mesophase between solid and liquid 5) The transition between the ferromagnetic and paramagnetic phases, at the Curie point. 6) The transition between ordered, commensurate or incommensurate, magnetic structures 7) The Martensitic transformation in carbon steel 8) Austenite transformation of iron. 9) Other order-disorder transitions - such as in alpha-titanium aluminides. 10) The emergence of superconductivity 11) The transition between molecular structures (polymorphs, allotropes) 12) Quantum condensation - Bose-Einstein Condensation 13) The breaking of symmetries in the laws of physics during the early history of the universe as its temperature cooled.
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