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2011 Final Question 1C

Posted: Thu Mar 10, 2016 12:32 pm
by 704578485
Why on question 1C of the 2011 final would NO have a greater residual entropy than BF3 at OK?

Re: 2011 Final Question 1C

Posted: Thu Mar 10, 2016 12:55 pm
by Bryan Lau 3H
Because NO has 2 orientations: ON or NO, and oscillation between these two possible configurations contribute to higher residual entropy. BF3, on the other hand, has only 1 possible configuration. No matter how you rotate the trigonal planar, you'll get exactly the same configuration.