Boiling and Melting point

[Jamie2002]

Are boiling point and melting point directly related? Do molecules with higher melting points have stronger intermolecular forces?

[Andrew Wang 1C]

Boiling and melting points can be related in the sense that both are higher when the substance has stronger intermolecular forces. So yes, a higher melting (and boiling) point means stronger intermolecular forces, since more energy (heat) will be required to overcome the interactions to change phase.

[Jessica Katz]

They are directly related because if a molecule has a high boiling point that means that the intermolecular forces are stronger keeping the molecules tightly held and harder to separate to then change into a gaseous state. That same molecule is going to take more energy to melt it as well, resulting in a high melting point. This can also be seen the other way where both points are low if the intermolecular forces are weak.

[AnjikaFriedman-Jha2D]

They are related in that when you are comparing two molecules or compounds, if one has a higher melting point it is likely to also have a higher boiling point because the same intermolecular forces contribute to both properties of the chemicals

[Norah Gidanian 3D]

Yes Molecules that have a higher melting or boiling point means that they have stronger intermolecular forces. If a molecule has hydrogen bonding it will very likely have the highest boiling point because it has very strong intermolecular forces. That is why waters boiling point is so high

[ellenulitsky Dis 1I]

Yes! How I like to think about it is that the molecules that have higher BP and MP are "stronger"(they can withstand dramatic temperatures) than molecules that have lower BP and MP. Hope that helps!

[Eunice_Castro_1G]

Hi! So molecules with higher boiling and melting points have stronger intermolecular forces. It takes more energy to break the bonds. Hope this helps!

[John_Tran_3J]

Both melting and boiling point increase when the intermolecular forces are stronger.

[Sharon Kim 2A]

The higher the boiling/melting point indicates that it takes more energy to break the bonds (stronger intermolecular forces).

[MMorcus2E]

Solids have strong IMFS to keep the atoms together to form a coherent structure, liquids have weaker IMFs (intermolecular forces) between atoms that keep them closer together while giving them some freedom to move, and gases have even weaker IMFs. Phase changes are mainly about overcoming IMFS. So boiling/melting points are used as a way to measure how strong the IMFs in your substance are. If the IMFs are strong you will have higher boiling and melting points because you will need more energy to overcome these IMFs. If the IMFs are weaker, you will have lower boiling and melting points because you won't need as much energy to overcome these IMFs.

[Sejal Parsi 3K]

The higher the boiling point or melting point is, it takes more energy to break the bonds, which would be the intermolecular forces.

[Veeda Khan 2E]

They're correlated (if one is high, the other will most likely be too) because changes in state of matter signify a change in the distance between molecules.

[Alejandro Gonzalez 2G]

I believe that the higher the boiling and/or melting point of a substance is, the stronger the intermolecular forces within it (as the bonds are stronger and harder to break).

[Susanna Givan 2B]

Which molecules tend to have stronger intermolecular forces and thus higher melting and boiling points?

[Sydney Jensen 3L]

The stronger the intermolecular forces, the harder it will be to break those bonds, thus resulting in a high boiling and melting point, so it could be safe to say they are related in that sense.

[Madeline Ogden 3B]

Normally a higher boiling point means that there is a stronger bond. This is because in order to break that bond it will require a lot of energy and in this case, energy comes in the form of heat.

[DPatel_2L]

Both melting and boiling points increase when IMFs are stronger.

[Valerie Tran 2B]

Yes, a higher boiling/melting point indicates strong bonds that need a lot of energy to break so the higher a boiling/melting point is, the stronger the INFs are.

[Mauricio Maravilla 3C]

Both melting point and boiling points are related to IMF's and IntraMF's

[Jacob Kirkosian 3C]

They are somewhat related in that when the intermolecular forces are stronger/weaker in one compound compared to another, dissimilar compound, both the boiling and melting points tend to increase/decrease in the same direction (positive/negative).

[405479701]

Yes, when the intermolecular forces are strong bp and mp increase. Molecules with higher bp and mp need more energy to break the bond.

[Joseph Liao 3C]

This makes a lot of sense! I don't know how I never put two and two together that stronger intermolecular forces would result in a higher boiling/melting point, but since more energy is needed to break bonds with strong intermolecular forces, it makes sense that the boiling/melting points for these molecules would be higher.

[Arad_Badiee_2B]

Yes, boiling and melting point are associated. Consider, H2O. We know that hydrogen bonds are a pretty strong intermolecular force, and that water is able to form them. Because of this strength, it takes alot of energy (in the form of heat) to break them (allowing a high boiling point), but because of these strong forces, the melting point is lower.

[isabella garcia - 1G]

A high melting and boiling point are indicative of strong intermolecular forces, because more energy is required to break the bonds present. Melting and boiling points will often increase together (though melting will generally be lower).

[Angela Harrington 2L]

The stronger the intermolecular forces a molecule has, the higher its boiling point/melting point is because more energy is required to break the stronger bonds.