Boiling point

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Riya Sood 4G
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Joined: Sat Aug 24, 2019 12:18 am

Boiling point

Postby Riya Sood 4G » Tue Nov 19, 2019 11:53 am

How does the molar mass relate to the boiling point?

Lauren Bui 1E
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Joined: Sat Jul 20, 2019 12:15 am

Re: Boiling point

Postby Lauren Bui 1E » Tue Nov 19, 2019 12:04 pm

larger molar mass means a larger boiling point

EvanWang
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Joined: Sat Sep 07, 2019 12:16 am

Re: Boiling point

Postby EvanWang » Tue Nov 19, 2019 12:51 pm

If a problem strictly mentions molar mass, or states that there are no dipole-dipole interactions or hydrogen bonding, then increasing molar mass increases the Van de Waal forces because larger molecules can have larger instantaneous dipole moments. Larger Van de Waal forces means more attraction between moleculres, which means more energy is required to break those forces, which means a higher boiling point.

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

Re: Boiling point

Postby Heba Mengesha 3D » Tue Nov 19, 2019 1:09 pm

For molecules, the boiling point increases with molecular weight.

Katherine Brenner 3H
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Re: Boiling point

Postby Katherine Brenner 3H » Mon Nov 25, 2019 7:53 pm

Molar mass and boiling point are positivley correlated.

ariaterango_1A
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Joined: Wed Sep 18, 2019 12:15 am

Re: Boiling point

Postby ariaterango_1A » Mon Nov 25, 2019 7:55 pm

As many students have stated molar mass and boiling point are directly proportional. When it comes to intermolecular forces, London dispersion forces increase with larger molecules thus increasing the boiling point. Hope this helps!

Jainam Shah 4I
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Joined: Fri Aug 30, 2019 12:16 am

Re: Boiling point

Postby Jainam Shah 4I » Mon Nov 25, 2019 9:16 pm

Larger molar mass for the most part implies that the molecule has more electrons and the element is further down the periodic table hence more atomic shells. This allows the molecules to induce a greater dipole spontaneously as more electrons can spontaneously rearrange themselves and attract to a partial positive on the other molecule. Larger molar mass means stronger dispersion forces. The stronger the IMF's thew higher the boiling point will be because you need to put in more energy to break the IMF's between the molecules.

Mandeep Garcha 2H
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Joined: Sat Aug 24, 2019 12:17 am

Re: Boiling point

Postby Mandeep Garcha 2H » Mon Nov 25, 2019 11:37 pm

The larger the molar mass, the higher the boiling point.

Daniel Yu 1E
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Joined: Sat Aug 24, 2019 12:15 am

Re: Boiling point

Postby Daniel Yu 1E » Mon Nov 25, 2019 11:45 pm

Higher molar mass means more protons and neutrons. More protons and neutrons means more electrons. More electrons means more movement of electrons. More movement of electrons means a potential for a greater disparity in the distribution of electrons-- a stronger dipole moment. Stronger dipole moment results in stronger intermolecular forces. These stronger intermolecular interactions require more energy, more heat, to force far apart, so there is a higher boiling point.

PriscillaLi_3G
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Joined: Fri Sep 27, 2019 12:30 am

Re: Boiling point

Postby PriscillaLi_3G » Mon Dec 02, 2019 4:23 pm

Higher molar masses mean that there are more electrons, which means more e- e- repulsion and shielding. This makes the distortion easier, which would increase the dipole moment, thus requiring a higher boiling point to break the bonds.

Mallika Chimpiri 3K
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Joined: Thu Jul 25, 2019 12:17 am

Re: Boiling point

Postby Mallika Chimpiri 3K » Mon Dec 02, 2019 4:33 pm

The greater the molar mass, the higher the boiling point.

AnayaArnold_3L
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Joined: Wed Sep 18, 2019 12:19 am

Re: Boiling point

Postby AnayaArnold_3L » Tue Dec 03, 2019 11:02 am

The greater the molar mass the higher the boiling point, because there are more atoms present.


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