9.23 Determining what has higher entropy state

Boltzmann Equation for Entropy:

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Emily Mei 1B
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9.23 Determining what has higher entropy state

Postby Emily Mei 1B » Mon Jan 29, 2018 10:40 pm

Which would you expect to have a higher molar entropy at T = 0, single crystals of BF3 or of COF2? Why?
I don't really understand the explanation at the back of the book for this one.

Mitch Mologne 1A
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Re: 9.23 Determining what has higher entropy state

Postby Mitch Mologne 1A » Mon Jan 29, 2018 11:14 pm

Because there are only F atoms around the B, there is no variability in how the molecule is structured. However, with COF2, the Oxygen atom can be in one of three places, which causes a higher molar entropy.

Riya Pathare 2E
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Re: 9.23 Determining what has higher entropy state

Postby Riya Pathare 2E » Tue Jan 30, 2018 7:46 am

Generally when the molecule tends to be more complex like the COF2 molecule it will have a higher entropy because of the different micro states there are.

Katie Lam 1B
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Re: 9.23 Determining what has higher entropy state

Postby Katie Lam 1B » Thu Feb 01, 2018 2:47 pm

Because COF2 has more microstates, its degeneracy is higher. The different atoms in COF2 can take more positions than the identical atoms in BF3 so it is at a higher entropy state.

Cassidy 1G
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Re: 9.23 Determining what has higher entropy state

Postby Cassidy 1G » Mon Feb 12, 2018 10:00 am

I have a follow up question to this... are we saying the three F atoms in BF3 can only be in one set position/they are not interchangeable? It seems like they would still be able to move into different positions.


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