cracking and the alkenes Flashcards
true or false?
Fractions containing larger hydrocarbon molecules are in less demand than those containing smaller hydrocarbon molecules.
true
how can large hydrocarbon molecules be broken down or cracked?
by using steam or catalytic cracking
what are the conditions for steam cracking
you mix vapor with steam and heat to very high temperature
what are the conditions of catalytic cracking
heat to 500 degrees celsius and pass over hot catalyst
what are the products of cracking
smaller hydrocarbons and another type of hydrocarbon called alkenes
what are alkenes
hydrocarbons that contain a carbon - carbon double bond
what happens when bromine water reacts with an alkene
it turns from orange/brown to colourless
what happens when bromine water reacts with an alkane
bromine water remains orange/ brown
what is the general formula for the homologous series of alkenes
CnH2n
are alkenes saturated or unsaturated
unsaturated
what are alkenes used to produce
polymers
what are the first 4 alkenes
ethane, propene, butane and pentene
what is the functional group in an alkene
c = c
Alkenes react with ______ but tend to burn with smoky ______ due to __________ combustion.
Alkenes react with oxygen but tend to burn with smoky flames due to incomplete combustion.
when alkenes react with water what is produced
alcohols
