Number of Bonds and Entropy


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Thu Uyen Tran 1B
Posts: 31
Joined: Fri Sep 29, 2017 7:05 am

Number of Bonds and Entropy

Postby Thu Uyen Tran 1B » Sun Feb 11, 2018 9:45 am

Can entropy be increased/decreased based on whether a molecule has multiple bonds vs one? Can we use this information when comparing two molecules to determine which has a higher entropy?

Masih Tazhibi 2I
Posts: 33
Joined: Fri Sep 29, 2017 7:06 am

Re: Number of Bonds and Entropy

Postby Masih Tazhibi 2I » Sun Feb 11, 2018 10:59 am

I think in general, there are a couple things to look at when comparing molecules. The first is the state each molecule occupies, as we know that Sgas>Sliquid>Ssolid. Additionally, it is important to compare the relative size of the molecule, as an increase in the number of bonds and electrons leads to higher positional entropy. Also, deltaS increases with molar complexity, so looking at the atomic structures would also give you some direction.

Ishita Monga 1B
Posts: 31
Joined: Thu Jul 27, 2017 3:00 am

Re: Number of Bonds and Entropy

Postby Ishita Monga 1B » Sun Feb 11, 2018 12:59 pm

A molecule's entropy increases as its complexity increases, so yes the number of bonds can be used to compare the entropy of two molecules.

Ilan Shavolian 1K
Posts: 58
Joined: Fri Sep 29, 2017 7:03 am

Re: Number of Bonds and Entropy

Postby Ilan Shavolian 1K » Sun Feb 11, 2018 8:50 pm

I think that would work because you increase the vibrational entropy when you increase the number of bonds.


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