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    bimbot2011's Avatar
    bimbot2011 Posts: 1, Reputation: 1
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    #1

    Feb 9, 2010, 06:48 PM
    Find pressure from temperature and moles
    Can you find the Pressure (kPa) in a gas when you know the number of moles and the absolute temperature?
    harum's Avatar
    harum Posts: 339, Reputation: 27
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    #2

    Feb 10, 2010, 01:02 PM

    pV=nRT, this is the equation of state for an ideal gas. You can see that you also need to know the volume of the gas, then you can calculate the pressure:

    p = nRT/V
    Unknown008's Avatar
    Unknown008 Posts: 8,076, Reputation: 723
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    #3

    Feb 16, 2010, 07:51 AM

    If, you know the pressure of that gas and that amount of moles at a certain temperature, you can use a shortcut.



    Say, one mole of a gas exert a pressure of 101600 Pa at 298 K. You need to find the pressure at 273 K.

    So, you get:



    Solve and you're done.

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