Question

WHICH GAS COMES OUT AS LIQUID FIRST DURING SEPARATION OF COMPONENTS OF AIR?

Answer 1

History ICT Irish Maths Music Physical Education Religious Studies Science Spanish Welsh 2nd Language Audio Games Facebook logoFind us on Facebook KS3 Bitesize More Bitesize BBC Teachers Home > Science > Edexcel (Pre-2011) > There’s one Earth > Useful products from air and seawater Print Science Useful products from air and seawater Page: 1234BackNext Fractional distillation of liquid air You need to be able to explain how nitrogen and oxygen are obtained from the air. You will recall that about 78% of the air is nitrogen and 21% is oxygen. These two gases can be separated by fractional distillation of liquid air. Liquefying the air Air is filtered to remove dust, and then cooled in stages until it reaches –200°C. At this temperature it is a liquid. We say that the air has been liquefied. Here's what happens as the air liquefies: water vapour condenses, and is removed using absorbent filters carbon dioxide freezes at –79ºC, and is removed oxygen liquefies at –183ºC nitrogen liquefies at –196ºC The liquid nitrogen and oxygen are then separated by fractional distillation. Fractional distillation Fractional distillation The liquefied air is passed into the bottom of a fractionating column. Just as in the columns used to separate oil fractions, the column is warmer at the bottom than it is at the top. The liquid nitrogen boils at the bottom of the column. Gaseous nitrogen rises to the top, where it is piped off and stored. Liquid oxygen collects at the bottom of the column. The boiling point of argon - the noble gas that forms 0.9% of the air - is close to the boiling point of oxygen, so a second fractionating column is often used to separate the argon from the oxygen. Uses of nitrogen and oxygen liquid nitrogen is used to freeze food food is packaged in gaseous nitrogen to increase its shelf life oil tankers are flushed with gaseous nitrogen to reduce the chance of explosion oxygen is used in the manufacture of steel and in medicine

Answer 2

Answer:

o2

Explanation:

it liquifies at -183 degree celcius