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Boiling Point

Posted: Sun Nov 10, 2019 1:13 am
by EthanPham_1G
In Professor Lavelle's lecture, why did he use boiling points to indicate which dipole attractions are stronger?

Re: Boiling Point

Posted: Sun Nov 10, 2019 1:36 am
by Andrew F 2L
Lavelle was trying to make a point about how the shape of the molecule has a big impact in physical properties like boiling points even though molecules will have the same bond types

Re: Boiling Point

Posted: Sun Nov 10, 2019 1:54 am
by JasonKwon_3k
The higher the boiling point, the stronger the IMFs are because the more energy it takes for them to boil due to stronger bonds. Therefore, the stronger the bond, the higher the boiling point.

Re: Boiling Point

Posted: Sun Nov 10, 2019 12:51 pm
by Joowon Seo 3A
Boiling point increases as a result of a higher intermolecular bond. For example water, which has hydrogen bonding, has stronger bonds than ethanol, which is nonpolar. This is shown by water's higher boiling point.

Re: Boiling Point

Posted: Sun Nov 10, 2019 1:25 pm
by Christine Honda 2I
Professor Lavelle uses boiling points to indicate which dipole interactions are stronger because the stronger the interactions between molecules, the more energy/heat required to separate them from each other, which raises the boiling point of the molecule.

Re: Boiling Point

Posted: Sun Nov 10, 2019 1:44 pm
by 405268063
Boiling point is when a liquid goes to the gas phase, and this requires a release of energy, and this comes from the breaking of these intermolecular bonds. But, stronger bonds mean that they are harder to break. In this way, boiling point could be a useful tool for telling us how strong the IMFs are.

Re: Boiling Point

Posted: Sun Nov 10, 2019 1:48 pm
by Sofia Barker 2C
The general rule is that, the stronger the intermolecular forces, the harder it is to break them. Thus boiling point is a measure of the strength of forces between atoms in a molecule. The higher the boiling point, the stronger the forces.

Re: Boiling Point

Posted: Sun Nov 10, 2019 1:53 pm
by SarahCoufal_1k
When a bond is stronger, it needs more energy to be broken. There is more energy in higher temperature. So when a bond is really strong, it needs more energy to be broken (and go to different state) i.e it has a higher boiling point/melting point. Similarly when a bond is weak, it needs little energy to be broken so the temperature does not need to be that high (low melting/boiling pt)

Re: Boiling Point

Posted: Sun Nov 10, 2019 1:55 pm
by gabbymaraziti
Boiling points relate to dipole-dipole interactions because as the strength of these interactions increases, more energy is required to separate the molecules, leading to a proportional increase in boiling point.

Re: Boiling Point

Posted: Sun Nov 10, 2019 6:21 pm
by Natalie Benitez 1E
How can we determine between elements which will have a higher boiling point?

Re: Boiling Point

Posted: Sun Nov 10, 2019 6:26 pm
by Alexis Robles 2k
The higher the boiling point means the more energy is needed to break the intermolecular forces.

Re: Boiling Point

Posted: Sun Nov 10, 2019 6:37 pm
by Haley Fredricks 1B
Natalie Benitez 1C wrote:How can we determine between elements which will have a higher boiling point?

Based on the type of intermolecular forces (so london dispersion and or hydrogen bonding) you can tell which will have higher boiling points. The more attracted molecules are to each other, the higher the boiling point will be.