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Flashcards in Cracking Hydrocarbons Deck (6)
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1

What is Cracking and why is it used?

Cracking is the process of breaking bigger molecules into smaller ones via thermal decomposition

These smaller ones are usually much more useful than the bigger molecules

C8 H18 (Octane - Petrol) can be turned into C4 H8 (Butene) + C4 H10 (Butane)

2

What colour do Alkenes (molecules produced by cracking that are unsaturated and have a double bond) turn bromine water?

Alkenes turn bromine water from orange to colourless.

This means we can test for them using this water.

3

How do we break down / crack large hydrocarbons?

We break down large hydrocarbons with thermal decomposition. This is done by hearing them and passing them over a catalyst. This is called cracking

4

What is a catalyst?

A catalyst is a material the molecule we want to crack has to be passed over.

5

What are the molecules produced by cracking with a double bond that are unsaturated?

Alkenes are molecules produced by cracking. They have a double bond and are saturated.

We can test for them using bromine water

6

What is thermal decomposition?

Thermal decomposition is the process of cracking larger molecules into smaller, more useful ones