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Real vs. Ideal

Discussion in 'DAT Discussions' started by nixon13, May 30, 2008.

  1. nixon13

    nixon13 7+ Year Member

    Jan 22, 2008
    Could someone please explain the differences between real gases and ideal gases, what they are, and which equations go with which gas? Thank you. :D
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  3. Optimism Smiles

    Optimism Smiles DAT drains my ATP 5+ Year Member

    Feb 24, 2007
    I think I read yesterday that no gas behaves 100% ideally but under certain conditions (such as low pressure and high temperatures) gases behave nearly ideally. Then you can use the ideal gas law...
  4. doc3232

    doc3232 7+ Year Member

    Feb 15, 2008
    Well, it is chemistry so as you expect, nothing is ideal. You can never find exact info using PV=nRT.
    So always just assume it is ideal and use that equation.
    But you should that why nothing is an ideal gas.
  5. Sea of ASH

    Sea of ASH 2+ Year Member

    Sep 15, 2007
    ideal gas is basically a hypothetical situation. we just assume that 1) there are no intermolecular forces between the gas molecules and 2) occupy a negligable volume compared to the container. this is done so that PV=nRT can be used to calculate stuff.

    real gases are exactly that... real lol. that formula is not valid anymore, but if we just tweek it a bit to take into considerations those two assumptions, we are good to go.

    Hope that helped!
  6. nixon13

    nixon13 7+ Year Member

    Jan 22, 2008
    thanks a lot guys, idk where i would be without this forum! :hardy:
  7. userah

    userah 7+ Year Member

    Aug 9, 2007
    i'll tell you where. a couple points less on the DAT. haha =)

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