5.13 I can describe catalytic cracking of long chain hydrocarbons

1.How are long chain hydrocarbons broken down?
By using heat.


2. What is the main safety aspect of the experiment? 
As the experiment goes on, you should not allow the water to go back to the test tube, as it will hit the steam and may cause an explosion.


3. What is cracking?
When long chain hydrocarbons are broken down, into smaller chains by using heat.. 


4. Why does the rate of gas production increase as the experiment goes on?
Because when the hydrocarbons get heated, the experiment moves faster.


5. Why does the ceramic pot turn black?
Because of interaction with organic material


6. What is the ceramic pot used for?
They are used as a catalyst to speed up the experiment


7. Why is the gas collected over water?
Because the gas is less dense than air, so then it goes into the test tube.


8. Why is cracking useful?
Because short chain hydrocarbons are more useful than long chain hydrocarbons.