Terms in this set (14)
Breaking down of long chain alkanes into shorter chain alkanes and alkenes
A compound comprising Hydrogen and Carbon only
Why do we use cracking?
To produce shorter chain hydrocarbons which are more useful
What type of reaction is cracking?
Soaked in liquid hydrocarbon to prevent direct mixing with catalyst
Speeds up the rate of reaction by providing a large surface area e.g aluminium oxide
Short chain alkane or alkene
Long chain hydrocarbon
Vaporised by heating before passing over a catalyst ..
Needed to vaporise the long chain hydrocarbon prior to cracking.
Vapour passes over hot catalyst
Longer chain hydrocarbons split apart on surface on the catalyst
Vaporised hydrocarbon is mixed with steam and heated to a very high temperature.
Bromine water test
Orange Bromine water remains orange in the present of alkanes
Bromine water goes colourless. in the presence of alkenes.
Use of alkenes
Polymers and plastics
Use of smaller chain alkanes
Fuels - as highly flammable. Good for combustion.