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Thread: water question...pls help me solve this

  1. #1 water question...pls help me solve this 
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    hello,
    pls help me solve this question.
    We have to have boil the water to raise its level to 1.5 metres. the problem is water evaporates when it is boiled. how do we do it ? we can even add anything to the water to reach that level. but in the end it has to be only water in that level.
    the experiment should be practical and should be able to try in a competition.


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  3. #2  
    Forum Isotope Bunbury's Avatar
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    the problem is water evaporates when it is boiled
    Think of this as an opportunity, not a problem.


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  4. #3  
    Universal Mind John Galt's Avatar
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    You have provided insufficient information. What is containing the water? The oceans? A Dewar flask? A glass capillary tube? etc
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  5. #4  
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    I think you know how to use pressure to make water go up a tube, don't you?
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  6. #5 Re: water question...pls help me solve this 
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    Quote Originally Posted by boombox
    hello,
    pls help me solve this question.
    We have to have boil the water to raise its level to 1.5 metres. the problem is water evaporates when it is boiled. how do we do it ? we can even add anything to the water to reach that level. but in the end it has to be only water in that level.
    the experiment should be practical and should be able to try in a competition.
    1. Is the water in a sealed or unsealed container?

    2. What is the level of the water before raising?

    3. What is the permissible water quality range - ie, purity or salinity levels?

    4. Why do you have to boil* the water to raise its level?

    *boil, by definition, means to convert part or all of a liquid into gas by applying heat or by reducing ambient pressure ... this will be a challenge if you need to keep it liquid ...
    Nature abhors perfection; cats abhor a vacuum.

    "I don't know; I'm making it up as I go ..." Dr H Jones (Jr).
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  7. #6  
    Forum Ph.D. Leszek Luchowski's Avatar
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    Here is a gentle hint from Mother Nature, with a friendly meaningful grunt:

    (I am linking the photo from this page, which is hereby credited for it).
    Leszek. Pronounced [LEH-sheck]. The wondering Slav.
    History teaches us that we don't learn from history.
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  8. #7  
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    try a U tube with one end sealed and the other open, completely fill the flask, make sure the tube is over 1.5 meters tall, about 2 will do. Remove all but .25 meters from the open side, leaving the sealed side completely full. Boil the water, making the sealed side fill with gas and raise the level on the open side. Done.
    Wise men speak because they have something to say; Fools, because they have to say something.
    -Plato

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