Alkanes Flashcards
what is the general formula for alkanes
CnH2n+2
how do you name alkanes
- find the longest chain
- name the branches
- add numbers its on
what structures have no isomers
methane propane and ethane
what is the polarity of alkanes
almost non-polar because of how similar carbon and hydrogen
what are the bp like for alkanes
longer chain length means higher intermolecular force, branched chains have lower bp as they cannot pack together as close
what is the solubility of alkanes
insoluble in water
how do alkanes react in water
unreactive
what happens in fractional distilation
crude oil is heated and put into a tower which vapour passes up the tower through trays which gets colder as ris
what is cracking
breaking long chain alkanes into smaller hydrocarbons
what is thermal cracking
heating the alkane to produce two shorter chains each ending in a carbon atom with an unpaired electron
what is catalytic cracking
zeolite catalyst is used to cut cost and speed up rate of reaction
what is complete combustion
burn in plenty oxygen
what is incomplete combustion
burnt in insufficient oxygen
what’s the impact on global warming
burning fossil fuels makes co2 creates greenhouse effect
