Alkenes

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What are Alkenes?
Unsaturated hydrocarbons
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What is the general formula for an Alkene?
CnH2n
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What is there none of unlike alkanes?
No rotation about the double bond
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What is a Z isomer?
The CH3 groups are on the same side
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What is an E Isomer?
When they are opposite
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What is Geometric isomerism?
It is a form of Stereoisomerism
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What is the definition of Stereoisomerism?
The same structural formula but the bonds are arranged differently in space
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What are the only intermolecular forces between the alkene molecule?
Van der Waal forces
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What happens with the BP and MP as the carbon atoms increase?
They increase
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What are alkenes like in water?
Not soluble
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What are alkenes like with alkanes?
They are more reactive
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What does the C == C form?
An electron rich area of the molecule
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What can happen to this molecule?
Attacked by positively charged reagants
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What are these reagents called?
Electrophiles
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What is the definition of an electrophile?
An electron acceptor
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What mechanism do alkenes undergo?
Electrophillic addition reaction
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What is the equation for the combustion of Alkenes?
CH2=CH2 + 3O2 --> 2CO2 + 2H20
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What is a Polymer?
A long chain molecule made from lots of small molecules joining together
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What is a monomer?
small molecules that join together to make polymers
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What is addition polymerisation?
ormation of large chain molecules from lots of small molecules joining joining with no other product
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What is the repeating Unit?
The smallest group of atoms that produce the polymer when repeated over and over again
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What are plastics?
Not biodegradable
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How can we dispose of plastic?
We use it or recycle it
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What is the first step of mechanical recycling?
Seperate the different types of plastic
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What happens after they are sorted?
Washed and they may be ground into small pieces
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What happens to these small pieces?
They are melted and remoulded
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Other cards in this set

Card 2

Front

What is the general formula for an Alkene?

Back

CnH2n

Card 3

Front

What is there none of unlike alkanes?

Back

Preview of the front of card 3

Card 4

Front

What is a Z isomer?

Back

Preview of the front of card 4

Card 5

Front

What is an E Isomer?

Back

Preview of the front of card 5
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