Hey there Sign in to join this conversationNew here? Join for free

Fractional Distillation of air

Announcements Posted on
    • Thread Starter
    • 0 followers
    Offline

    ReputationRep:
    Hey,

    I have a couple of quick questions with regards fractional distillation of air, if you wouldn't mind answering.

    1) After the air is cooled to -200C to liquefy it, carbon dioxide and water are removed. But from some sources I've read "water vapour condenses and is removed" but also "water and carbon dioxide are solids at this temperature and so are removed". So, if the water condenses, surely it's liquid before it's removed?

    2) Why is the nitrogen in gaseous form when it is distilled but the oxygen and argon in liquid form?

    Thank you
    • 21 followers
    Offline

    ReputationRep:
    (Original post by Instinct01)
    Hey,

    I have a couple of quick questions with regards fractional distillation of air, if you wouldn't mind answering.

    1) After the air is cooled to -200C to liquefy it, carbon dioxide and water are removed. But from some sources I've read "water vapour condenses and is removed" but also "water and carbon dioxide are solids at this temperature and so are removed". So, if the water condenses, surely it's liquid before it's removed?

    2) Why is the nitrogen in gaseous form when it is distilled but the oxygen and argon in liquid form?

    Thank you
    1. In this sense, condensation means solid. The reverse of sublimation for example is condensation.

    2. All of the gases are liquids and then allowed to warm up until each one in turn becomes a gas.

Reply

Submit reply

Register

Thanks for posting! You just need to create an account in order to submit the post
  1. this can't be left blank
    that username has been taken, please choose another Forgotten your password?

    this is what you'll be called on TSR

  2. this can't be left blank
    this email is already registered. Forgotten your password?

    never shared and never spammed

  3. this can't be left blank

    6 characters or longer with both numbers and letters is safer

  4. this can't be left empty
    your full birthday is required
  1. By joining you agree to our Ts and Cs, privacy policy and site rules

  2. Slide the button to the right to create your account

    Slide to join now Processing…

Updated: June 4, 2012
New on TSR

Moving on from GCSEs

What advice would you give someone starting A-levels?

Article updates
Reputation gems:
You get these gems as you gain rep from other members for making good contributions and giving helpful advice.