Boiling Point

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EthanPham_1G
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Joined: Sat Jul 20, 2019 12:17 am

Boiling Point

Postby EthanPham_1G » Sun Nov 10, 2019 1:13 am

In Professor Lavelle's lecture, why did he use boiling points to indicate which dipole attractions are stronger?

Andrew F 2L
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Joined: Sat Aug 17, 2019 12:17 am

Re: Boiling Point

Postby Andrew F 2L » Sun Nov 10, 2019 1:36 am

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

JasonKwon_3k
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Joined: Thu Jul 11, 2019 12:16 am

Re: Boiling Point

Postby JasonKwon_3k » Sun Nov 10, 2019 1:54 am

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.

Joowon Seo 3A
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Re: Boiling Point

Postby Joowon Seo 3A » Sun Nov 10, 2019 12:51 pm

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.

Christine Honda 2I
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Re: Boiling Point

Postby Christine Honda 2I » Sun Nov 10, 2019 1:25 pm

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.

405268063
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Joined: Thu Jul 25, 2019 12:17 am

Re: Boiling Point

Postby 405268063 » Sun Nov 10, 2019 1:44 pm

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.

Sofia Barker 2C
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Joined: Wed Sep 18, 2019 12:21 am

Re: Boiling Point

Postby Sofia Barker 2C » Sun Nov 10, 2019 1:48 pm

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.

SarahCoufal_1k
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Re: Boiling Point

Postby SarahCoufal_1k » Sun Nov 10, 2019 1:53 pm

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)

gabbymaraziti
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Joined: Wed Sep 18, 2019 12:19 am

Re: Boiling Point

Postby gabbymaraziti » Sun Nov 10, 2019 1:55 pm

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.

Natalie Benitez 1C
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Re: Boiling Point

Postby Natalie Benitez 1C » Sun Nov 10, 2019 6:21 pm

How can we determine between elements which will have a higher boiling point?

Alexis Robles 2k
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Joined: Wed Sep 18, 2019 12:18 am

Re: Boiling Point

Postby Alexis Robles 2k » Sun Nov 10, 2019 6:26 pm

The higher the boiling point means the more energy is needed to break the intermolecular forces.

Haley Fredricks 1B
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Re: Boiling Point

Postby Haley Fredricks 1B » Sun Nov 10, 2019 6:37 pm

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.


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