Boiling and Melting point

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Jamie2002
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Boiling and Melting point

Postby Jamie2002 » Tue Nov 17, 2020 10:11 am

Are boiling point and melting point directly related? Do molecules with higher melting points have stronger intermolecular forces?

Andrew Wang 1C
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Re: Boiling and Melting point

Postby Andrew Wang 1C » Tue Nov 17, 2020 10:24 am

Boiling and melting points can be related in the sense that both are higher when the substance has stronger intermolecular forces. So yes, a higher melting (and boiling) point means stronger intermolecular forces, since more energy (heat) will be required to overcome the interactions to change phase.

Jessica Katz
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Re: Boiling and Melting point

Postby Jessica Katz » Tue Nov 17, 2020 11:07 am

They are directly related because if a molecule has a high boiling point that means that the intermolecular forces are stronger keeping the molecules tightly held and harder to separate to then change into a gaseous state. That same molecule is going to take more energy to melt it as well, resulting in a high melting point. This can also be seen the other way where both points are low if the intermolecular forces are weak.

AnjikaFriedman-Jha2D
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Re: Boiling and Melting point

Postby AnjikaFriedman-Jha2D » Fri Nov 20, 2020 9:59 am

They are related in that when you are comparing two molecules or compounds, if one has a higher melting point it is likely to also have a higher boiling point because the same intermolecular forces contribute to both properties of the chemicals

Norah Gidanian 3D
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Re: Boiling and Melting point

Postby Norah Gidanian 3D » Fri Nov 20, 2020 10:19 am

Yes Molecules that have a higher melting or boiling point means that they have stronger intermolecular forces. If a molecule has hydrogen bonding it will very likely have the highest boiling point because it has very strong intermolecular forces. That is why waters boiling point is so high

ellenulitsky Dis 1I
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Re: Boiling and Melting point

Postby ellenulitsky Dis 1I » Fri Nov 20, 2020 10:38 am

Yes! How I like to think about it is that the molecules that have higher BP and MP are "stronger"(they can withstand dramatic temperatures) than molecules that have lower BP and MP. Hope that helps!

Eunice_Castro_1G
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Re: Boiling and Melting point

Postby Eunice_Castro_1G » Fri Nov 20, 2020 11:08 am

Hi! So molecules with higher boiling and melting points have stronger intermolecular forces. It takes more energy to break the bonds. Hope this helps!

John_Tran_3J
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Re: Boiling and Melting point

Postby John_Tran_3J » Fri Nov 20, 2020 12:43 pm

Both melting and boiling point increase when the intermolecular forces are stronger.

Sharon Kim 2A
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Re: Boiling and Melting point

Postby Sharon Kim 2A » Fri Nov 20, 2020 1:19 pm

The higher the boiling/melting point indicates that it takes more energy to break the bonds (stronger intermolecular forces).

MMorcus2E
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Re: Boiling and Melting point

Postby MMorcus2E » Sat Nov 21, 2020 12:08 am

Solids have strong IMFS to keep the atoms together to form a coherent structure, liquids have weaker IMFs (intermolecular forces) between atoms that keep them closer together while giving them some freedom to move, and gases have even weaker IMFs. Phase changes are mainly about overcoming IMFS. So boiling/melting points are used as a way to measure how strong the IMFs in your substance are. If the IMFs are strong you will have higher boiling and melting points because you will need more energy to overcome these IMFs. If the IMFs are weaker, you will have lower boiling and melting points because you won't need as much energy to overcome these IMFs.

Sejal Parsi 3K
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Re: Boiling and Melting point

Postby Sejal Parsi 3K » Sat Nov 21, 2020 4:35 am

The higher the boiling point or melting point is, it takes more energy to break the bonds, which would be the intermolecular forces.

Veeda Khan 2E
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Re: Boiling and Melting point

Postby Veeda Khan 2E » Sat Nov 21, 2020 7:22 am

They're correlated (if one is high, the other will most likely be too) because changes in state of matter signify a change in the distance between molecules.

Alejandro Gonzalez 2G
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Re: Boiling and Melting point

Postby Alejandro Gonzalez 2G » Sun Nov 22, 2020 11:24 pm

I believe that the higher the boiling and/or melting point of a substance is, the stronger the intermolecular forces within it (as the bonds are stronger and harder to break).

Susanna Givan 2B
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Re: Boiling and Melting point

Postby Susanna Givan 2B » Sun Nov 22, 2020 11:26 pm

Which molecules tend to have stronger intermolecular forces and thus higher melting and boiling points?

Sydney Jensen 3L
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Re: Boiling and Melting point

Postby Sydney Jensen 3L » Mon Nov 23, 2020 1:56 pm

The stronger the intermolecular forces, the harder it will be to break those bonds, thus resulting in a high boiling and melting point, so it could be safe to say they are related in that sense.

Madeline Ogden 3B
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Re: Boiling and Melting point

Postby Madeline Ogden 3B » Mon Nov 23, 2020 2:46 pm

Normally a higher boiling point means that there is a stronger bond. This is because in order to break that bond it will require a lot of energy and in this case, energy comes in the form of heat.

DPatel_2L
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Re: Boiling and Melting point

Postby DPatel_2L » Fri Dec 11, 2020 8:05 pm

Both melting and boiling points increase when IMFs are stronger.

Valerie Tran 2B
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Re: Boiling and Melting point

Postby Valerie Tran 2B » Fri Dec 11, 2020 8:07 pm

Yes, a higher boiling/melting point indicates strong bonds that need a lot of energy to break so the higher a boiling/melting point is, the stronger the INFs are.

Mauricio Maravilla 3C
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Re: Boiling and Melting point

Postby Mauricio Maravilla 3C » Fri Dec 11, 2020 8:13 pm

Both melting point and boiling points are related to IMF's and IntraMF's


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