5.13 I can describe catalytic cracking of long-chain hydrocarbons

1) define the word catalyst: a substance that changes the rate of reaction
2) why is catalyst used? to speed up the reaction rate of cracking, they can also slow down reactions such as for rusting
3) why are high temperatures needed?high temps are needed to break the strong covalent bonds in the hydrocarbon 



What types of catalysts are used for cracking? silica and alumina
What equipment do you need to collect the gas? boiling tube, a basin full of water, delivery tube.
What hydrocarbon is he cracking? paraffin
How are alkanes tuned into alkenes? through cracking with either silica or alumina as the catalyst
At what temperature can this experiment work at? 600-700 degrees celsius