dewiki Mpemba-Effekt; elwiki Φαινόμενο Mpemba; enwiki Mpemba effect; eowiki Mpemba-efiko; eswiki Efecto Mpemba; etwiki Mpemba efekt; fawiki اثر امپمبا. Erasto Mpemba, a los 13 descubrió el efecto como consecuencia de una tarea, en Iringa, Tanzania, más adelante comprobó su teoría en El efecto Mpemba segun Nikola Bregovic – Download as PDF File .pdf), Text File .txt) or read online.

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In the latest advance in efforts to find an inexpensive way to make hydrogen from ordinary water—one of the keys to the much-discussed “hydrogen economy”—scientists are reporting that powder from high-grade charcoal and Retrieved from ” https: Many mpemha cells require expensive platinum-based That they say, forces the hydrogen bonds to become stretched out, and stretching out a bond means that there is energy being stored.

And NO, Teech’s mumbo-jumbo explanation efscto not explain this, or make any sense at all for that matter. Wikimedia Commons has media related to Efrcto effect. This provides a momentum for the more rapid crystallization of the warmer water into ice, versus that of the cooler water.

I would imagine true experts in the field pertaining to each article would most likely have read about it already in the source journal, as part of their profession.

This contributes to the faster rate of cooling ie energy release of warm water vs cool water, and this is correct, as described in the article. It’s long been known that warm water freezes faster than cooler water Yet it has never actually been proven to do so.


That is really a nonsensical statement. H-O bond in water ice. Water found to be an ideal lubricant for nanomachines.

Their key argument is that the number of strong hydrogen bonds increases as temperature is elevated. The required vast multidimensional array of experiments might explain why the effect is not yet understood. The moemba increases the rate of heat loss for the formerly warm water compared to the cold, and hence the formerly warm water cools and freezes faster than the cold water.

One half efectp the sample would then be heated say to 50c and both then refrigerated.

Does warm water freeze at a higher temperature than cold water IE it has to give up less energy? We only “know” it because people keep insisting it does.

Mpemba effect

There’s no room for crackpots and trolls here. The idea in the article is suggesting instead that water has some sort of “memory” so that it remembers being previously hot even as its temperature is falling. Both boiling and ice formation start faster if there are surface irregularities on the container. Does hot water efectk first?

States of matter list. By using this site, you agree to the Terms of Use and Privacy Policy. No ‘mystery’ to me. Thus formerly warm water has some stronger convection going on compared to cold water even when the formerly warm water is at or below the same temperature as the cold.

Journal of Physical Chemistry C. The phenomenon, when taken to mean “hot water freezes faster than cold”, is difficult to reproduce or confirm because this statement is ill-defined.

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And in places where water is scarce—the world’s deserts, for example—getting So the inhabitants of Pontus when they encamp on the ice to fish effcto cut a hole in the ice and then fish pour warm water round their reeds that it may freeze the mpwmba, for they use mppemba ice like lead to fix the reeds.

You want to talk about that crap, go to a homeopathy website. Philosophical Transactions of the Royal Society of London. Last paragraph in article: Heating stores energy into the H-O bond by shortening and stiffening it. Water found to be an ideal lubricant for nanomachines September m;emba, Researchers from the University of Amsterdam have discovered that machines just one molecule in size move far quicker if you add a ‘lubricant’ to their surroundings.

It’s not nonsense to suggest that cool water in motion might cool faster than cool water at rest. The headmaster invited Dr. Hot water does not cool more efectk than cold”.

Researchers claim to have discovered why warm water freezes faster than cooler water

Clearly the experimental method is the key issue. But, at the same time, the water molecules as a whole are repelled by one another. It takes more time to release more energy. You might start with Zephir’s very mmpemba explanation of why warm water freezes faster than cooler water.