Coursework.Info - Inspiration in an Instant

On the left is an image preview of every page of this document, and below are the first 150 words with formatting removed:

Fractional Distillation Alkanes and alkenes are two homologous series of hydrocarbons, made up of hydrogen and carbon only. Alkanes are mainly found in crude oil and natural gas, found in underground reservoirs. Crude oil was formed over millions of years from the remains of tiny aquatic plants and animals that lived in ancient seas. Crude oil, or petroleum, owes its existence largely to one-celled marine organisms. As these organisms died, they sank to the sea bed. Usually buried with sand and mud, they formed an organic-rich layer that eventually turned to sedimentary rock. The process repeated itself, one layer covering another. Then, over millions of years, the seas withdrew. In lakes and inland seas, a similar process took place with deposits formed of non-marine vegetation. In some cases, the deposits that formed sedimentary rock didn't contain enough oxygen to completely decompose the organic material. Bacteria broke down the trapped and preserved...

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 145,982 others

OR

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