The compound ${\mathrm{C}}_5{\mathrm{H}}_{12}$ has three isomers.

a. Draw the structures of these isomers.

b. Their boiling points are 9.5, 28, and 36 degree Celsius. Match these to your drawings, and explain your choice. 

a. Name the two simplest alkenes.

b. Now draw their structural formulae.

What makes alkenes react so differently from alkanes?

Ethene can ploymerise. What does that mean?

a. Propene is unsaturated. What does that mean?

b. Write an equation for its reaction with bromine.

How would you turn propene into propane?