Boiling Points

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Alvaro Chumpitaz 4D
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Joined: Wed Sep 11, 2019 12:17 am

Boiling Points

Postby Alvaro Chumpitaz 4D » Tue Nov 19, 2019 6:55 pm

Explain the difference in the boiling points of NO2 (21 celsius) and N20 (-88 celsius)

MingdaH 3B
Posts: 133
Joined: Thu Jul 11, 2019 12:17 am

Re: Boiling Points

Postby MingdaH 3B » Tue Nov 19, 2019 7:04 pm

N2O is linear while NO2 is bent, and so the latter is a polar molecule. Due to this, NO2 IMF's are stronger, and therefore would have a higher boiling point

LReedy_3I
Posts: 51
Joined: Fri Aug 30, 2019 12:17 am

Re: Boiling Points

Postby LReedy_3I » Wed Nov 20, 2019 5:38 pm

The shape affects the type and strength of forces in the molecules. Because NO2 is polar, it has dipole-dipole interactions rather than just London forces, and these stronger forces make the boiling point higher

Jorge Ramirez_4H
Posts: 54
Joined: Wed Nov 21, 2018 12:19 am

Re: Boiling Points

Postby Jorge Ramirez_4H » Wed Nov 20, 2019 7:08 pm

So the stronger the forces are the higher the boiling point?

Jorge Ramirez_4H
Posts: 54
Joined: Wed Nov 21, 2018 12:19 am

Re: Boiling Points

Postby Jorge Ramirez_4H » Wed Nov 20, 2019 7:08 pm

Does that mean that an ion-ion interaction would have the highest bp? NaCl

Jorge Ramirez_4H
Posts: 54
Joined: Wed Nov 21, 2018 12:19 am

Re: Boiling Points

Postby Jorge Ramirez_4H » Wed Nov 20, 2019 7:12 pm

Are melting points and boiling points the same in regards to forces?

Tyler Angtuaco 1G
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Joined: Wed Sep 11, 2019 12:16 am

Re: Boiling Points

Postby Tyler Angtuaco 1G » Wed Nov 20, 2019 7:19 pm

NO2- would have a bent molecular shape, preventing its dipoles from cancelling. N20 would be linear, causing its dipoles to cancel. Thus, NO2- has dipole-dipole interactions, which are stronger than the LDF that N20 only has.

905385366
Posts: 54
Joined: Sat Jul 20, 2019 12:16 am

Re: Boiling Points

Postby 905385366 » Wed Nov 20, 2019 9:48 pm

Jorge Ramirez_4H wrote:So the stronger the forces are the higher the boiling point?

Yes, the stronger the forces, the more energy is needed to vaporize them, therefore, the stronger the forces the higher the boiling point.


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