1. Guest, be sure to check out How To Get Into Dental School, our free downloadable PDF with step-by-step details for dental school applicants!
    Dismiss Notice
  2. Dismiss Notice

Real vs. Ideal

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

  1. nixon13

    Joined:
    Jan 22, 2008
    Messages:
    252
    Likes Received:
    1
    Status:
    Pre-Dental
    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
     
  2. Thread continues after this sponsor message. SDN Members do not see this ad.

  3. Optimism Smiles

    Optimism Smiles DAT drains my ATP

    Joined:
    Feb 24, 2007
    Messages:
    200
    Likes Received:
    0
    Status:
    Pre-Dental
    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

    Joined:
    Feb 15, 2008
    Messages:
    3,809
    Likes Received:
    9
    Status:
    Dental Student
    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

    Joined:
    Sep 15, 2007
    Messages:
    254
    Likes Received:
    1
    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

    Joined:
    Jan 22, 2008
    Messages:
    252
    Likes Received:
    1
    Status:
    Pre-Dental
    thanks a lot guys, idk where i would be without this forum! :hardy:
     
  7. userah

    Joined:
    Aug 9, 2007
    Messages:
    555
    Likes Received:
    0
    Status:
    Dental Student
    i'll tell you where. a couple points less on the DAT. haha =)
     

Share This Page