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Thread: Why does..

  1. #1 Why does.. 
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    hot water freeze quicker than cold water? when it is in the freezer.


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  3. #2 Re: Why does.. 
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    Quote Originally Posted by Roxy121
    hot water freeze quicker than cold water? when it is in the freezer.
    Wait...what? :?


    Whence comes this logic: no evidence = false?

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  4. #3  
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    Sorry if i'm not making much sense, i'll explain it better. When i put a cup with cold water in the freezer it doesn't get frozen quick but when i put a cup of hot water it does the oppisite. I was just wandering why it does that.
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  5. #4  
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    Quote Originally Posted by Roxy121
    Sorry if i'm not making much sense, i'll explain it better. When i put a cup with cold water in the freezer it doesn't get frozen quick but when i put a cup of hot water it does the oppisite. I was just wandering why it does that.
    The wording was fine...I just never knew that. Can't explain how that could be possible. I mean, in order for that to happen, you'd have to be at very low (?) pressures, if I'm reading this cooling curve:

    And this phase diagram: correctly. Even then, I can't see how it will jump from a hot state to a cold state faster than how it will jump from a cool state to a cold state.
    Whence comes this logic: no evidence = false?

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  6. #5  
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    It is known as the Mpemba effect and supposedly in certain circumstances, water does freeze quicker when it is hot than when it is cold. I was wondering if anyone had seen a plausible explaination for this occurance. It would seem to go against all that we know about the natural world but it is still nevertheless perfectly natural.
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