boiling point

Moderators: Chem_Mod, Chem_Admin

Posts: 50
Joined: Wed Sep 18, 2019 12:19 am

boiling point

Postby NHolmes3L » Sun Dec 08, 2019 9:23 am

How do you determine high vs low boiling point?

Reina Robles 2B
Posts: 62
Joined: Fri Aug 09, 2019 12:16 am

Re: boiling point

Postby Reina Robles 2B » Sun Dec 08, 2019 9:25 am

Substances with higher boiling points will have stronger intermolecular interactions. Conversely, substances with lower boiling points will have weaker intermolecular interactions.

I hope this helps!

Jacob Motawakel
Posts: 70
Joined: Wed Sep 18, 2019 12:20 am
Been upvoted: 1 time

Re: boiling point

Postby Jacob Motawakel » Sun Dec 08, 2019 8:21 pm

Stronger intermolecular forces have a higher boiling point. If same IMF, such as LDF, the larger molecule will have a higher boiling point.

Deepika Reddy 1A
Posts: 103
Joined: Thu Jul 11, 2019 12:15 am

Re: boiling point

Postby Deepika Reddy 1A » Sun Dec 08, 2019 8:28 pm

The stronger the IMFs, the higher the boiling point. For example, it takes more energy to break dipole-dipole IMFs than to break London dispersion IMFs because dipole dipole forces are stronger. Therefore, by looking at the IMFs, we can predict which substances have a higher boiling point.

Sean Sugai 4E
Posts: 56
Joined: Wed Sep 11, 2019 12:17 am

Re: boiling point

Postby Sean Sugai 4E » Sun Dec 08, 2019 8:31 pm

Substances that have a higher boiling point are more polar and greater IMF, such as dipole-dipole interactions, LDFs, hydrogen bonds, ion-ion, and dipole-induced-dipole.

Heba Mengesha 3D
Posts: 50
Joined: Sat Sep 07, 2019 12:19 am

Re: boiling point

Postby Heba Mengesha 3D » Sun Dec 08, 2019 8:50 pm

The boiling point of a molecule depends on its structure. It can depend on the intermolecular forces present between the atoms or molecules and boiling points increase as the size of the molecule increases.

Posts: 87
Joined: Wed Sep 18, 2019 12:18 am

Re: boiling point

Postby CMaduno_1L » Sun Dec 08, 2019 9:42 pm

It is also important to remember that boiling does not break bonds. So when explaining the effect that boiling point has, my TA suggested avoiding using the phrase "break bonds" and use "overcome intermolecular forces" instead.

Kimberly Koo 2I
Posts: 84
Joined: Sat Aug 17, 2019 12:17 am

Re: boiling point

Postby Kimberly Koo 2I » Sun Dec 08, 2019 9:58 pm

When something has stronger intermolecular forces, the boiling point is generally higher. For example, if a molecule has H-bonds, it'll have a higher boiling point than a molecule with only London Dispersion Forces, as LDF are weaker than H-bonds.

Hussain Chharawalla 1G
Posts: 84
Joined: Sat Jul 20, 2019 12:15 am

Re: boiling point

Postby Hussain Chharawalla 1G » Sun Dec 08, 2019 10:30 pm

Also remember the respective strength of intermolecular forces. Hydrogen bonds are much stronger than LDF. Ion-dipole then dipole-dipole, etc. etc. Ionic bonds are weak in water.

Return to “Interionic and Intermolecular Forces (Ion-Ion, Ion-Dipole, Dipole-Dipole, Dipole-Induced Dipole, Dispersion/Induced Dipole-Induced Dipole/London Forces, Hydrogen Bonding)”

Who is online

Users browsing this forum: No registered users and 1 guest