Alkenes are a homologous series of unsaturated hydrocarbons. The table shows information about some alkenes. [Figure B9.1]

1. (a)Decene is a liquid at 25°C. How can you make this deduction from the data in the table?[2]
2. (b)Butene boils at –6°C. Use the kinetic particle theory to explain what happens when butene boils.[2]
3. (c)A sample of ethene gas in a gas syringe is heated from 20°C to 100°C. The pressure remains constant. Describe and explain, in terms of the kinetic particle theory, what happens to the volume of the gas.[2]
4. (d)At room temperature ethene diffuses faster than butene. Explain why.[1]
5. (e)Draw the structure, showing all the atoms and all the bonds, for two isomers with the molecular formula C4H8.[2]
6. (f)The structure of hexene is shown. [Figure B9.2] Draw the structure, showing all the atoms and all the bonds, for the product of the reaction of hexene with steam.[1]

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