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    Hi, I was revising intermolecular forces and I found that van der waals forces actually encompasses all intermolecular forces. Does this mean that in my explanations I should use London forces to describe dispersion forces and dipole dipole to describe IMF between polar molecules? Or can I still use VDW when describing London forces? Btw I'm studying the edexcel course.
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    I think the best thing to do would be to find a question on it in a past paper and look at the mark scheme. That way you can get an answer you are 100% confident will give you the marks! I'm not 100% sure, but If I had to guess I'd say that you wouldn't need to mention them when talking about polar molecules, especially nitrogen/fluorine/oxygen with hydrogen since their intermolecular forces are strong enough to make vdw seem irrelevant. But like I said, trust the mark scheme, not me!
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    I am a bit unsure about what exactly it is you are asking. Could you re-phrase your question?

    For the record, London Dispersion Forces is another name for Van der Waals' forces.
 
 
 
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