Logged out
Access All our Essays in an Instant
Swap your work for FREE access, or pay £4.99 for instant access
To Identify 5 Given Oils By Testing Their Viscosity At Different Temperatures.
Member rating: No Rating | Words: | Submitted: Thu Jul 11 2002
Page Preview
On the left is an image preview of every page of this document, and below are the first 150 words with formatting removed:
To identify 5 given oils by testing their viscosity at different temperatures. Scientific research: We know that oil comes out of the ground is called crude oil. Crude oil was formed from the remains of tiny sea animals and plants, which died millions of years ago. It is a mixture of substances called hydrocarbons. These are compounds of hydrogen and carbon. "At an oil refinery, the different substances in crude oil are separated in a fractionating tower. The oil is boiled so that most rises up the tower as vapour (gas). As it rises, it cools different substances condense (turn to liquid) at different temperatures, and are collected at different levels. The different parts of mixture are called fractions. Separating fractions by boiling is called fractional distillation. Heavier Fractions have longer molecules than lighter fractions. Using a chemical process called cracking, long molecules can be broken up to make shorter ores. So, if there...
Get instant access
- Instant, unlimited access to our documents in full
- Swap your work for free access, or pay £4.99
- To see the full version of this document and 147,187 others
Receive email updates for this category
- Simply tell us your email address and receive a weekly Study Help Email for FREE
- Receive 3 FREE essay views with each email
- Get all the latest essays from Coursework.Info & discussion from TheStudentRoom.co.uk
