2 Second Chemistry Question

Discussion in 'General Science & Technology' started by engineerjoe, May 25, 2010.

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  1. engineerjoe

    engineerjoe Registered Senior Member

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    2 Second Chemistry Question

    Trying to theoretically boil 1 L of water in a closed container at 90 degrees Celsius and using the correlating boiling pressure for water at this temperature. In order to find the size of the container I tried using the Ideal Gas Law with the following variables:

    V = solving for this.
    P = .697 atm
    n = 55.6 moles/liter
    R = .0821 (L*atm)/(mol*K)
    T = 363.15 K

    The result shows a volume of 2378.3 L needed to carry out this experiment. I believe I have made a mistake. Surely water could be boiled in a smaller vessel, right?
     
    engineerjoe, May 25, 2010
    #1

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  3. James R

    James R Just this guy, you know? Staff Member

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    The pressure would be higher in a smaller container, for the same amount of water.
     
    James R, May 26, 2010
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  5. Just Curious

    Just Curious Registered Senior Member

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    There is something wrong with your definition of "n". If you do a dimensional analysis on the formula V=nRT/P you find "n" must have the dimensions of litres not moles per litre.
     
    Just Curious, Jun 4, 2010
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  7. James R

    James R Just this guy, you know? Staff Member

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    n has no units. It's a number of moles. All he is saying is that there are 55.6 moles of water in 1 litre of liquid water (for which he is doing the calculation).
     
    James R, Jun 5, 2010
    #4
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