Boiling vs. Melting Point

[Danielle DIS2L]

What's the difference between melting and boiling point? Can you give examples?

[Kristina Krivenko 3I]

The boiling point is the temperature at which a liquid evaporates and turns into gas whereas the melting point is the temperature at which a solid melts to become a liquid.

For example, at the melting point of water, ice turns into liquid water; and at its boiling point, water evaporates and turns into water vapor.

[Darlene Lien 3E]

Hi, to add on, I think for this unit with IMF, the main idea that we should get from it is that boiling points and melting points follow the same trend, where a stronger IMF=higher boiling/melting point. Hope this helps!

[Adrienne Yuh 2B]

They are both affected in the same way by intermolecular bond strengths, but are defined differently as shown above.

[AndrewNguyen_2H]

The boiling point is from the liquid to gas phase while the melting point is from the solid to liquid phase.

[Jonathan Batac - 2D]

Boiling point is the transition of matter from a liquid to a gas while melting point is the transition from a solid to a liquid. I wouldn't worry too much about the difference at the moment, but in relation to intermolecular forces, they trend mostly the same way.

[Anil Chaganti 3L]

Another way to distinguish the difference is to understand how the transition of a substance works. For example, if we had a solid, the transition from a solid to liquid to gas involves two different things: the melting (which comes first) and the boiling point. Both require energy in the form of heat (usually) which involves the strength of intermolecular forces. Just like for intramolecular forces (where stronger bonds like double bonds were harder to break), the greater the strength of the IMFS, the larger the energy required to break the bonds. Just for review, this is the order of the IMFs bond strength in decreasing order: ion-ion, ion-dipole, hydrogen bonding, dipole-dipole, dipole-induced dipole, and London dispersion forces.

[Veeda Khan 2E]

The melting point is the temperature from which a substance turns from a solid to a liquid (ice to water), the boiling point is the temperature from which a substance turns from a liquid to a gas (water to vapor). Generally speaking, a high melting point will coincide with a high boiling point.

[Ava Nickman]

They are two completely separate phase changes. The boiling point is when a liquid becomes a gas and the melting point is when a solid becomes a liquid. The boiling point is a higher temperature than the melting point. We often measure the durability of a molecule based on the values of the melting and boiling points. The lower the temperatures of the phase changes, the weaker the molecule, indicating the strength of its bonds.

[Earl Garrovillo 2L]

Boiling point is the temperature where a compound changes from liquid to gas whereas the melting point is where a molecule/element changes from solid to liquid. A simple example of boiling is when water becomes water vapor, and melting is when ice becomes water. In context of what we're learning right now, boiling and melting points increase when intermolecular forces become stronger and vice versa, when the IMF of a molecule are weak then their boiling/melting points are lower.

[Emma Chang 1G]

The boiling point is the temperature at which a substance changes from a liquid phase to gas phase, and the melting point is the temperature at which a substance changes from a solid phase to a liquid phase. I believe both follow the same trends in relation to IMF. Boiling and melting points are higher when the IMF are stronger, and they are lower when the IMF are weaker.

[Halle Villalobos 3E]

Hi! A boiling point is a temperature at which a liquid turns to a gas state (water to water vapor). A melting point is when something goes from a solid state to a liquid state (ice to liquid water). I hope this helps!

[Lung Sheng Liang 3J]

Boiling point refers to the temperature at which an element transitions from a liquid to a gaseous state (water to water vapor) and the melting point is the temperature at which an element transitions from a solid to a liquid (ice to water).

[Brian Nguyen 2I]

Boiling point is the point at which a liquid turns into a gas. Melting point is the point at which a solid turns into a liquid. The more intermolecular forces that are present, the higher the boiling and melting points of a substance will be.

[Joshua Eidam 2A]

Just adding on, and I am not entirely certain if this is what the original question is asking for, but in the context of bonds, the boiling and melting points are heavily affected by the strength of the bond. Specifically, the stronger the bond length is, the higher both the melting and boiling points are since the molecule is held more tightly together. In terms of bond length, this means that the shorter the bond length, the stronger the bond is, therefore the higher the melting and boiling points are (and vice versa). Although bond length and strength are not the only factors that contribute to boiling and melting point so just take that into account as well.
Hope this helps.

[Evonne Hsu 1J]

Stronger IMFs will definitely result in higher melting and boiling points. The boiling point is defined by a compound changing from liquid to gas phase while the melting point is a compound changing from the solid to liquid phase.