Alkanes and Alkenes: Physical Properties

1. Melting points / Boiling points

1.1. As the number of carbon atoms increase,so does the melting and boiling point of the alkane/alkene this is also a result of the increased Van der Waals forces between molecules.

2. Conductivity

2.1. Alkanes and Alkenes do not conduct heat or electricity well.

3. Physical States:

3.1. 1-4 Carbon Atoms = Gas

3.2. 5-14 Carbon Atoms = Liquid

3.2.1. This is because of the greater Van der Waals forces that exist between molecules in alkenes and alkanes with more carbon atoms.

3.3. 15+ Carbon Atoms = Solid

4. Solubility in water

4.1. Alkanes and Alkenes are insoluble in water, but are soluble in non-polar solvents instead.