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Hot water freezes faster than cold?

  1. http://www.iflscience.com/chemistry/hot-water-freezes-faster-cold-and-now-we-know-why

    I thought that this had never been shown to happen with closed containers. I always thought that this was an issue of open containers allowing for evaporation and hence a smaller amount of frozen water, and that if lids were put on then the cold froze faster.

    Does anyone have any thoughts on the vague explanation proposed in this link?
     
  2. jcsd
  3. UltrafastPED

    UltrafastPED 1,919
    Science Advisor
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