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Boiling point

Posted: Tue Nov 19, 2019 11:53 am
by Riya Sood 4G
How does the molar mass relate to the boiling point?

Re: Boiling point

Posted: Tue Nov 19, 2019 12:04 pm
by Lauren Bui 1E
larger molar mass means a larger boiling point

Re: Boiling point

Posted: Tue Nov 19, 2019 12:51 pm
by EvanWang
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.

Re: Boiling point

Posted: Tue Nov 19, 2019 1:09 pm
by Heba Mengesha 3D
For molecules, the boiling point increases with molecular weight.

Re: Boiling point

Posted: Mon Nov 25, 2019 7:53 pm
by Katherine Brenner 3H
Molar mass and boiling point are positivley correlated.

Re: Boiling point

Posted: Mon Nov 25, 2019 7:55 pm
by ariaterango_1A
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!

Re: Boiling point

Posted: Mon Nov 25, 2019 9:16 pm
by Jainam Shah 4I
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.

Re: Boiling point

Posted: Mon Nov 25, 2019 11:37 pm
by Mandeep Garcha 2H
The larger the molar mass, the higher the boiling point.

Re: Boiling point

Posted: Mon Nov 25, 2019 11:45 pm
by Daniel Yu 1E
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.

Re: Boiling point

Posted: Mon Dec 02, 2019 4:23 pm
by PriscillaLi_3G
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.

Re: Boiling point

Posted: Mon Dec 02, 2019 4:33 pm
by Mallika Chimpiri 3K
The greater the molar mass, the higher the boiling point.

Re: Boiling point

Posted: Tue Dec 03, 2019 11:02 am
by AnayaArnold_3L
The greater the molar mass the higher the boiling point, because there are more atoms present.