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Straight Chain - Branched Chain - Boiling Point.
What is a Straight Chain?
chain is made from carbon atoms which are
joined onto no more than two other carbon atoms.
What is a Branched Chain?
A branched chain
from carbon atoms
where at least one carbon* atom
is joined onto more than two other carbon atoms.
What are the Isomers of Butane?
Of the isomers of butane, n-butane has a
and 2-methylpropane has a
The two isomers have different boiling points
(and other physical properties).
n-butane has a higher boiling point than 2-methylpropane.
What is the Effect of Chain Branching on Boiling Point?
In general, straight
chain molecules have a higher
boiling point than isomers with a branched chain.
The reason is that straight chain molecules can
line up beside each other more effectively
than branched chain molecules and therefore
have a higher intermolecular force of attraction.
In addition to straight
chains and branched chains,
carbon atoms can form rings.
Links Hydrocarbons Revision Questions
gcsescience.com The Periodic Table Index Oil Products Quizzes gcsescience.com
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