Crude oil is a fossil fuel. Describe how crude oil is separated into fractions.

  • Google+ icon
  • LinkedIn icon
  • 1016 views

This is done by a process called cracking.

Cracking is the process by which the crude oil is heated up in the oil refineries to separate the oil into separate molecules/hydrocarbons.

By heating the crude oil, it is boiled/evaporated - this is the process of converting a liquid to a gas.

The column in which they are heated in hotter at the bottom and cooler at the top. Because the separate molecules/hydrocarbons have different boiling points, they condense (turn from vapour to liquid) at different temperatures, this is the process of separating into their different fractions.

Lucy G. GCSE Chemistry tutor, GCSE Biology tutor, 13 plus  Maths tuto...

About the author

is an online GCSE Chemistry tutor with MyTutor studying at Kings, London University

Still stuck? Get one-to-one help from a personally interviewed subject specialist.

95% of our customers rate us

Browse tutors

We use cookies to improve your site experience. By continuing to use this website, we'll assume that you're OK with this. Dismiss

mtw:mercury1:status:ok