A concept problem on organic chemistry

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SUMMARY

Alkanes, classified as saturated hydrocarbons, are often perceived as unreactive; however, they do undergo combustion reactions with oxygen, demonstrating their reactivity under certain conditions. The discussion highlights the misconception that alkanes are chemically stable, contrasting them with truly unreactive substances like noble gases. It emphasizes the role of activation energy in facilitating reactions, particularly combustion, and notes that alkanes can participate in free radical processes. The conversation underscores the importance of understanding the specific conditions under which alkanes react.

PREREQUISITES
  • Understanding of saturated hydrocarbons and their properties
  • Basic knowledge of combustion reactions and oxygen's role
  • Familiarity with activation energy concepts
  • Knowledge of free radical reactions and their mechanisms
NEXT STEPS
  • Research the mechanisms of free radical reactions in organic chemistry
  • Study the concept of activation energy and its impact on chemical reactions
  • Explore the differences between reactive and unreactive compounds in organic chemistry
  • Investigate the combustion process of various hydrocarbons, including alkanes
USEFUL FOR

This discussion is beneficial for chemistry students, organic chemists, and educators seeking to clarify the reactivity of alkanes and the principles governing combustion and free radical reactions.

jeremy22511
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Alkanes are saturated hydrocarbons which are very unreactive.
However, they undergo combustion, i.e. they react with oxygen. Why?

(Even compounds as unreactive as polythene with over thousands of carbon atoms per molecule undergoes combustion...)
 
Chemistry news on Phys.org
Perhaps look into activation energy or similar?
 
Why says alkanes aren't reactive? Alkanes are fairly reactive, or we'd use PE instead of glassware in the lab.

Noble gases are unreactive. Nitrogen is fairly unreactive. PTFE is fairly unreactive. But alkanes? No. They react with all sorts of things.
 
But my textbook says they don't react with acids, alkalis, dehydrating agents, O.A., R.A. etc. It was this that gave me the idea that alkanes are chemically stable...
Can anyone help me? Thanks.

J
 
Fire is a free radical process and alkanes DO undergo free radical reactions.
 

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