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James Buthlay Cracking liquid paraffin 03/10/04 In this investigation we set up and experiment to try a figure out what was given off when we 'cracked' liquid paraffin. Cracking is the process of breaking down large, not very useful hydrocarbons and splitting them up into smaller, more useful hydrocarbons. When cracking a hydrocarbon, we always end up with alkanes and at least one alkene. Paraffin can be cracked by passing liquid paraffin vapour over hot pieces of porcelain. The gases released then travel down through a tube into a test tube where they are bottles and collected. These are the gases in which we are trying to identify. The first test to try and identify what we had collected in the test tube, was a test for hydrogen. This was a simple test and simply involved putting a lighted splint into the test tube. If a 'pop' occurred then...

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