State of a molecule

Science questions not covered in Chem 14A and 14B. Try to limit questions to chemistry (inorganic chemistry, physical chemistry, organic chemistry, biophysical chemistry, biochemistry, materials science, environmental chemistry).

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Mrudula Akkinepally
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State of a molecule

Postby Mrudula Akkinepally » Sun Dec 06, 2020 2:38 am

In lecture 26, Dr. Lavelle drew a Lewis structure and identified that it was in the gas state. I just want to clarify that we don't know how to determine the state of a molecule solely based on its Lewis Structure, right?

Follow up question: how would we determine what state a molecule is in? Like would that information just be given to us?

Thank you!

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Re: State of a molecule

Postby 305572629 » Sun Dec 06, 2020 9:26 am

No- we shouldn't have to know that for this course! If anything, assume normally that the diatomic molecules N2 and O2 and common molecules like CO2 are in their gaseous state, and that metals are solids, but other than that I don't believe we are responsible for knowing states of molecules.

Sophia Stewart 3F
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Joined: Wed Sep 30, 2020 9:48 pm

Re: State of a molecule

Postby Sophia Stewart 3F » Sun Dec 06, 2020 9:49 am

It seems like we're usually given the state if it's needed.

Bella Bursulaya 3G
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Re: State of a molecule

Postby Bella Bursulaya 3G » Sun Dec 06, 2020 10:47 am

Nope! I think it would be impossible to know. When given H2O, it could be in the gas, liquid, or solid phase but unless we're given the state or temperature, we won't know just from the Lewis structure (because remember the different states are based on intermolecular forces, so the overall shape of the molecule won't change). Hope this helps!

abby hyman
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Joined: Thu Jul 25, 2019 12:16 am

Re: State of a molecule

Postby abby hyman » Sun Dec 06, 2020 11:30 am

I do not think any questions would be asked in this class about what state of matter an atom or molecule would be in. Other than knowing that metals are solid and the obvious gasses, you should be solid

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Re: State of a molecule

Postby 805421690 » Thu Dec 17, 2020 12:32 am

The state is given if needed!

Jessie Hsu 1C
Posts: 85
Joined: Wed Sep 30, 2020 9:49 pm

Re: State of a molecule

Postby Jessie Hsu 1C » Thu Dec 17, 2020 12:58 am

Yes! I believe that the state will be given unless there are other details provided that allow us to determine the state such as temperature, pressure, etc.

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