HW: 9.23 COF2 and BF3


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Yinhan_Liu_1D
Posts: 51
Joined: Sat Sep 24, 2016 3:00 am

HW: 9.23 COF2 and BF3

Postby Yinhan_Liu_1D » Sun Jan 29, 2017 6:03 pm

COF2 will have a higher molar entropy than BF3.

They would both be trigonal planar molecules. The answer says that since O and F will disorder the COF2 by occupying the same location.

Is my understanding right that the molecule that has a distorted composition will have a higher entropy than the molecule that is non polar (undistorted)? Or is there any further explanation?

I would appreciate your reply.

Taravat_Lakzian_1C
Posts: 18
Joined: Wed Sep 21, 2016 2:56 pm

Re: HW: 9.23 COF2 and BF3

Postby Taravat_Lakzian_1C » Sun Jan 29, 2017 11:07 pm

That could be a possible explanation, but it would best to draw out lewis structures of COF2 and BF3. By drawing out the structures, you can see that the elements can be in different positions, and whichever molecule has the most displacements, it will have higher entropy.

Yinhan_Liu_1D
Posts: 51
Joined: Sat Sep 24, 2016 3:00 am

Re: HW: 9.23 COF2 and BF3

Postby Yinhan_Liu_1D » Mon Jan 30, 2017 9:02 pm

Taravat_Lakzian_1C wrote:That could be a possible explanation, but it would best to draw out lewis structures of COF2 and BF3. By drawing out the structures, you can see that the elements can be in different positions, and whichever molecule has the most displacements, it will have higher entropy.


So it is because, the more arrangements of the molecule structure there are, the higher the degeneracy W is, thus the higher entropy.


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