Cracking crude oil 3.0 / 5 based on 1 rating ? ChemistryCrude oil, cracking and hydrocarbonsGCSEAQA Created by: ZaraCreated on: 11-01-13 22:48 What is the process of cracking? Cracking means splitting up long-chain hydrocarbons by passing vapour over a hot catalyst 1 of 11 What are some of the products of cracking useful for? Petrol for cars AND Paraffin for jet fuel 2 of 11 What does cracking also produce? Ethene 3 of 11 What is ethene needed for? Making plastics 4 of 11 What type of reaction is cracking? Thermal Decomposition 5 of 11 What does thermal decomposition mean? Breaking down molecules by heating them 6 of 11 What is the first step of cracking? Heating the long-chain hydrocarbon to vaporise it (turn it into gas) 7 of 11 What is the second step of cracking? The vapour is passed over a powdered catalyst at a temperature of about 400'C - 700'C 8 of 11 What is the last step of cracking? The long-chain molecules split apart or "crack" on the surface of the catalyst 9 of 11 What catalyst is used? Aluminium Oxide 10 of 11 What are most of the products of cracking? Alkanes and Alkenes 11 of 11
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