Cracking Hydrocarbons (C1b)

Revision cards for part of the GCSE C1b

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  • Created by: Joe
  • Created on: 20-02-11 11:05

Cracking Hydrocarbons

Longer-chain hydrocarbons can be Cracked (broken down) into shorter more useful chains, which release energy more quickly by burning

(http://img151.imageshack.us/img151/7436/cracking1.jpg)

Cracking involves...

-Heating the hydrocarbons until they vapourise

-Passing the vapour over a hot catalyst

A thermal decomposition reaction then takes place

The products of cracking include alkanes and alkenes (Unsaturated).

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Alkenes (Unsaturated Hydrocarbons)

As well as forming single bonds with other atoms, carbon atoms can form double bonds

This means that not all the carbon atoms are linked to 4 other atoms; a double carbon bond is present instead.

(http://img88.imageshack.us/img88/6446/cracking2.jpg)

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Making Alcohol from Ethene

Ethanol is an alcohol. It can be produced by reacting the alkene ethene with steam in the presence of a catalyst, phosphoric acid

(http://img827.imageshack.us/img827/3777/cracking3.jpg)

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Comments

Jazz M

this is really helpful!

Anas

Thankssssssss :)

Zanaib Pandhair

woop

lucy

didnt really have that much info really................sorry but didnt work for me......... what a shame we do need more than just 2 words on each page u pile of 

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