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boiling point

Posted: Sun Dec 08, 2019 9:23 am
by NHolmes3L
How do you determine high vs low boiling point?

Re: boiling point

Posted: Sun Dec 08, 2019 9:25 am
by Reina Robles 2B
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!

Re: boiling point

Posted: Sun Dec 08, 2019 8:21 pm
by Jacob Motawakel
Stronger intermolecular forces have a higher boiling point. If same IMF, such as LDF, the larger molecule will have a higher boiling point.

Re: boiling point

Posted: Sun Dec 08, 2019 8:28 pm
by Deepika Reddy 1A
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.

Re: boiling point

Posted: Sun Dec 08, 2019 8:31 pm
by Sean Sugai 4E
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.

Re: boiling point

Posted: Sun Dec 08, 2019 8:50 pm
by Heba Mengesha 3D
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.

Re: boiling point

Posted: Sun Dec 08, 2019 9:42 pm
by CMaduno_1L
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.

Re: boiling point

Posted: Sun Dec 08, 2019 9:58 pm
by Kimberly Koo 2I
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.

Re: boiling point

Posted: Sun Dec 08, 2019 10:30 pm
by Hussain Chharawalla 1G
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.