A concept problem on organic chemistry

In summary, alkanes are saturated hydrocarbons that are typically unreactive, but they can undergo combustion and free radical reactions. This is because they have a low activation energy, making them more reactive compared to other unreactive compounds like noble gases, nitrogen, and PTFE. However, they are still considered chemically stable as they do not react with acids, alkalis, dehydrating agents, oxidizing agents, or reducing agents.
  • #1
jeremy22511
29
0
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...)
 
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  • #2
Perhaps look into activation energy or similar?
 
  • #3
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.
 
  • #4
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
 
  • #5
Fire is a free radical process and alkanes DO undergo free radical reactions.
 

1. What is organic chemistry?

Organic chemistry is the branch of chemistry that deals with the study of carbon-based compounds, their properties, structure, and reactions. It is a fundamental discipline that forms the basis of many scientific fields, including biochemistry, medicine, and materials science.

2. What are some common examples of organic compounds?

Organic compounds can be found in all living organisms, and they also make up a large portion of our everyday materials, such as plastics, fuels, and medicines. Some common examples include carbohydrates, proteins, lipids, and nucleic acids.

3. What are functional groups in organic chemistry?

Functional groups are specific arrangements of atoms or bonds within a molecule that determine its reactivity and chemical properties. They are responsible for the characteristic properties of organic compounds and can be classified into various categories, such as alcohols, aldehydes, and carboxylic acids.

4. What is the difference between organic and inorganic chemistry?

The main difference between organic and inorganic chemistry is the type of compounds they study. Organic chemistry deals with carbon-based compounds, while inorganic chemistry focuses on non-carbon-based compounds. Inorganic compounds are typically simpler and have fewer bonds than organic compounds.

5. How is organic chemistry important in everyday life?

Organic chemistry plays a crucial role in our everyday lives, from the food we eat, the clothes we wear, to the medicines we take. It is also essential in the development of new materials, such as plastics and polymers, and in the production of fuels and energy sources. Organic chemistry has also contributed greatly to our understanding of biological processes and the treatment of diseases.

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