Boiling Point

[Jose Robles 1D]

Does one always use London Forces to determine boiling point? I ask because dipole moments are not always reliable.

[Jared_Yuge]

You always take them into account but if there is a greater intermolecular force that is stronger you consider those instead such as dipole-dipole.

[Deepika Reddy 1A]

Boiling point can be determined by looking at the strongest intermolecular force that a substance has. If it has a stronger intermolecular force, then it has a higher boiling point. If both substances have london dispersion forces as their strongest IMF, then look at the size of the molecules and the number of electrons to determine which one has a higher boiling point.

[ShravanPatel2B]

You shouldn't disregard an intermolecular force when doing these problems because certain forces are stronger than others which can change your answer in different scenarios of different questions

[AndreiRekesh1I]

You can use london forces to compare boiling point if the molecules are both nonpolar, because then you know there's no dipole-dipole at play.