Solubility & Size of Substances with London Forces

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In summary, London Forces are the weakest type of intermolecular force that occur between all molecules due to temporary dipoles caused by electron shifting. These forces can impact the solubility of substances by influencing the strength of intermolecular attractions, with substances with stronger London Forces having a higher boiling point and being less soluble in polar solvents. The size of molecules can also affect London Forces, with larger molecules having stronger forces and being more difficult to dissolve in polar solvents. These forces can be broken by adding energy, such as heat, and increasing the temperature of a substance can decrease their strength and make it easier for substances to dissolve. However, at extremely high temperatures, the molecules may completely break apart regardless of the strength of London
  • #1
ilii
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Hello,

How can you tell if a substance like CO(2) is small enough to be soluble while having the London forces holding it together? is there an equation? how am I supposed to know if a substance is too big to be soluble while having London forces?

thank you ;D
 
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  • #2
I think it is the first time I see these things mentioned together, TBH I have no idea what the question is.

ilii said:
London forces holding it together?

Holding what together?
 

Related to Solubility & Size of Substances with London Forces

1. What are London Forces?

London Forces, also known as dispersion forces or van der Waals forces, are the weakest type of intermolecular force. They occur between all molecules, regardless of polarity, and are caused by temporary dipoles created by the shifting of electrons within a molecule.

2. How do London Forces impact the solubility of substances?

London Forces can affect the solubility of substances by influencing the strength of the intermolecular attractions between molecules. Substances with stronger London Forces will have a higher boiling point and be less soluble in polar solvents, while substances with weaker London Forces will have a lower boiling point and be more soluble in polar solvents.

3. What is the relationship between size of molecules and London Forces?

The size of molecules can impact the strength of London Forces. Generally, larger molecules have more electrons and a larger surface area, which allows for stronger temporary dipoles and thus stronger London Forces. This can make it more difficult for larger molecules to dissolve in polar solvents.

4. Can London Forces be broken?

Yes, London Forces are temporary and can be broken by adding energy, such as heat, to a substance. This causes the molecules to move more rapidly and decrease the strength of the London Forces.

5. How does temperature affect London Forces?

As mentioned in the previous question, adding energy in the form of heat can break London Forces. Therefore, increasing the temperature of a substance can decrease the strength of London Forces and make it easier for substances to dissolve in polar solvents. However, at extremely high temperatures, the molecules may have enough energy to break completely apart and form a gas, regardless of the strength of London Forces.

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