Exergonic Reactions: Polar Molecule Stability?

In summary, the conversation revolves around the stability of polar molecules in exergonic reactions. The question is whether polar molecules are more stable because the electrons spend more time in a lower energy region, or if there is another reason. The example of CO2 and H2O in the combustion of methane is given, with the conclusion that CO2 is not polar because the 'pull' of the oxygen atoms is balanced. The discussion then explores the stability of polar molecules in general and whether there is a method for determining the most likely products of a reaction based on their stability.
  • #1
nobahar
497
2
Hello!
Quick question, but it's really bugging me!
Exergonic reactions often yield polar molecules as the products (e.g. combustion of methane). Are these polar molecules 'favourable' because the electrons are spending more time in a lower energy region; or is this wrong, and there's a different reason why polar molecules are more stable?
All responses appreciated.
 
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  • #2
Give us an example of the polar molecules you are referring to regarding the combustion of methane. CO2 and H2O? One is polar and one isn't...
 
  • #3
Ohhhh, CO2 isn't polar because the 'pull' of the oxygen atoms is 'balanced'. So I'm guessing polar molecules are not stable more generally? Why would they be, I suppose...
In that case, is there a method of determining the most likely products of a reaction, given that they attempt to form the most stable products?
Thanks for the reply, and any further ones. :smile:
 

1. What is an exergonic reaction?

An exergonic reaction is a chemical reaction that releases energy as it proceeds. This energy is typically in the form of heat or light.

2. What makes a molecule polar?

A molecule is polar if it has a positive and negative end due to an uneven distribution of electrons. This occurs when the atoms in the molecule have different electronegativities, causing a separation of charge.

3. Why are exergonic reactions important in maintaining polar molecule stability?

Exergonic reactions help maintain polar molecule stability by releasing excess energy from polar molecules. This energy release helps to balance out the polarity of the molecule, making it more stable.

4. Can exergonic reactions occur in non-polar molecules?

Yes, exergonic reactions can occur in non-polar molecules. However, the energy released is typically not as significant as in polar molecules due to the lack of polarity.

5. How does temperature affect the stability of polar molecules in exergonic reactions?

Temperature can impact the stability of polar molecules in exergonic reactions. Higher temperatures can cause the molecules to vibrate more, which can disrupt the polarity and potentially destabilize the molecule. Lower temperatures can help maintain the polarity and stability of the molecule.

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