C - Reactions of alkenes

How do alkenes react with other elements?

The double bond separates to leave a single bond where new atoms are added, called addition reactions

WHat is the functional group for alkenes?

Carbon-Carbon double bond

What is hydregonation?

Addition of hydrogen as hydrogen reacts with the carbons and forms a saturated alkane

How is alcohol from alkenes are formed?

• Water is added to ethene producing ethanol

• The mixture is passed from reactors to a condenser

• Ethanol have a higher boiling point than ethene so condense while ethene is recycled back to the reactor

• The ethanol is purified using fractional distillation

How does bromine test for alkenes?

Bromine water is added to a saturated compound like alkane, so no reaction happen

When bromine water is added to alkenes, it makes a colourless compound so bromine is decolourized