Thursday, October 18th 2012, 7:00 PM EDT
- Ice Cubes
Earlier this month I posted a Royal Society of Chemistry competition that concerned a very simple question and had a very complicated answer:
RSC offers £1000 for explanation of an unsolved legendary phenomenon - rsc.org
Why does hot water freeze faster than cold water?
It seems a simple enough question - yet it has baffled the best brains for at least 2,300 years.
•Aristotle agonized over it fruitlessly in the fourth century BC
•Roger Bacon in the 13th century used it to advocate the scientific method in his book Opus Majus
•Another Bacon, Francis, wrote in his 1620 Novum Organum, that "slightly tepid water freezes more easily than that which is utterly cold" but could not explain why
•Descartes was defeated by it in the 17th century AD
•Even perplexed 20th and 21st century scientists and intellectuals have swarmed over it without result
Now we may have an answer to part of this question by the current results from the Arctic....
Fastest Arctic Ice Extent Refreeze Ever! (in 31 days) - sunshinehours.wordpress.com
Today is day 291 in the Arctic. The minimum in 2012 was on day 260 – 31 days ago.
If you calculate the percentage of ice gained (the refreeze) 31 days after minimum, then 2012 is the fastest refreeze ever!
Arctic Sea Ice Extent has increased by 43.8% since the minimum was reached...click above sunshinehours.wordpress.com link to see full results, and the result points in favour of the comments section of made by William R. Pratt regarding Water vapour having a NEGATIVE feedback mechanism....well done Will