Forum Discussion
Lantley
Mar 20, 2018Nomad
riven1950 wrote:
Hot water does not freeze faster than cold water. It will lose heat at a faster than coldwater. At some point hot water becomes cold water and then the freeze rate is the same, if that makes sense. Put a bucket of 100 degree water and a bucket of 40 degree water outside in freezing weather and see which freezes first.
"The phenomenon of hot water freezing faster than cold water is known as the Mpemba effect, named after Erasto Mpemba, a Tanzanian student who in 1963 was making ice cream as part of a school project.
The students were meant to boil a mixture of cream and sugar, let it cool down, and then put it in the freezer.
Worried about getting a spot in the freezer, Mpemba instead put his mixture in while it was still scorching hot. But after 1.5 hours, his mixture had frozen, while his classmates' mixtures had not.
Intrigued by this phenomenon, he went on to work with physics professor Denis Osborne, and together they were able to replicate the findings and publish a paper in 1969 showing that warm water freezes faster than cold water."
I did not just make this stuff up! Google it while not totally understood it is a real phenomenon.
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