Alkanes - Organic Flashcards
What is an akane
A saturated hydrocarbon
Are alkanes polar
Why
Non polar
As carbon and hydrogen have similar electronegative
Are alkanes soluble in water
Why
Insoluble
Due to hydrogen bonding in water being stronger than Alkanes van de waals
What reactions does alkanes undergo
2
Combustion
Reaction with halogens
What are the conditions for thermal cracking
700–1200K temperature
Up to 7000 kPa pressure
What does thermal cracking make
Makes alkenes
What are the conditions for catalytic cracking
720k temp
Lower pressure than thermal
Zeolite catalyst
What are the main products of catalytic cracking
3 points
Cycloalkanes
Aromatic hydrocarbons
Branched alkanes
What is a fuel
Something which releases heat energy when combusted
What type of hydrocarbons are most likely to undergo incomplete combustion
Longer chains
What is the environmental impact of unburnt hydrocarbons
Photochemical smog
What are flue gases
Gases given out by power stations
How are halogenalkanes formed from alkanes
Free radical reaction
What are the stages of free radical substitution
Initiation
Propagation
Termination
