Question

How do London dispersion forces increase?

Answer 1

London dispersion forces are the weak forces which are going to be exhibited by the atoms which are going to exist as dipoles. We can see this type of force between all types of molecules irrelevant to their nature.

Complete answer:
- In the question it is asked how London dispersion forces increase.
- When an atom is going to form a dipole automatically the adjacent atom is going to get attracted by the formed dipole.
- This type of forces between different atoms or molecules is called London forces.
- These forces are very weak and exist between different molecules including polar and non-polar.
- If the molecules are going to polarize very easily then London forces are going to get increased.
- London forces are high in n-pentane when compared to neo-pentane even though both have the same molecular formula.
- Because of the constant movement of the electrons in the dipole this type of forces are going to increase their strength.
- If the molecules are very close then this type of force will increase.
- Bigger molecules with high polarizability increase the strength of the London forces.
- The shape of the molecule also affects the rate of the London forces. If the surface is very high then London forces will be high.

Note:
Factors that are going to affect the London forces are distance between the molecules or atoms, shape of the molecule and polarizability. London dispersion forces are weak when compared to dipole –dipole forces.