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Edexcel IGCSE Chemistry 復(fù)習(xí)筆記 4.3.1 Alkanes

Category: IGCSE課程, 國際課程, 教材筆記, 福利干貨 Date: 2022年8月16日 下午2:51

Edexcel IGCSE Chemistry 復(fù)習(xí)筆記 4.3.1 Alkanes

The Alkanes

 

  • Alkanes are a group of?saturated?hydrocarbons
    • The term saturated means that they only have single carbon-carbon bonds, there are no double bonds

     

  • The general formula of the alkanes is?CnH2n+2
  • They are colourless compounds which have a gradual change in their physical properties as the number of carbon atoms in the chain increases
  • Alkanes are generally unreactive compounds but they do undergo?combustion?reactions, can be?cracked?into smaller molecules and can react with?halogens?in the presence of light
  • Methane is an alkane and is the major component of?natural?gas

 

4.3.1-Alkanes-First-5-members-14.3.1-Alkanes-First-5-members-2

 

This table shows the first five members of the alkane homologous series

 

Exam Tip

For your exam, you need to be able to name, draw and give the appropriate formula for the first?five?alkanes.

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