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9.23 Determining what has higher entropy state

Posted: Mon Jan 29, 2018 10:40 pm
by Emily Mei 1B
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.

Re: 9.23 Determining what has higher entropy state

Posted: Mon Jan 29, 2018 11:14 pm
by Mitch Mologne 1A
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.

Re: 9.23 Determining what has higher entropy state

Posted: Tue Jan 30, 2018 7:46 am
by Riya Pathare 2E
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.

Re: 9.23 Determining what has higher entropy state

Posted: Thu Feb 01, 2018 2:47 pm
by Katie Lam 1B
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.

Re: 9.23 Determining what has higher entropy state

Posted: Mon Feb 12, 2018 10:00 am
by Cassidy 1G
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.