Page 1 of 1

Molar Entropy

Posted: Sun Mar 11, 2018 4:54 pm
by Jacquelyn Hill 1
Is the size of a molecule significant in determining whether it has a higher molar entropy than another molecule?

Re: Molar Entropy

Posted: Sun Mar 11, 2018 6:01 pm
by Alyssa Pelak 1J
Yes! A larger molecule has a higher molar entropy. This is because it is more complex and has more electrons.

Re: Molar Entropy

Posted: Sun Mar 11, 2018 6:41 pm
by ConnorThomas2E
Things that often lead to higher molar entropy are more complex structures (the bonds can absorb more vibration energy), heavier atoms, and formation of gas particles. Therefore, size and complexity are helpful to determine the molar entropy.

Re: Molar Entropy

Posted: Sun Mar 11, 2018 7:14 pm
by Sophia Bozone 2G
Yes, the larger a molecule is, the larger it's molar entropy. This is because a larger molecule has more possible substates, positions, or orientations. It's degeneracy is higher. For example, a linear molecule can have two possible orientations, whereas a trigonal planar molecule could have more.

Re: Molar Entropy

Posted: Sun Mar 11, 2018 8:34 pm
by Jacquelyn Hill 1
Also, is the size a more significant factor in determining this than the state that the molecule is in?

Re: Molar Entropy

Posted: Sun Mar 11, 2018 11:03 pm
by Mishta Stanislaus 1H
Jacquelyn Hill 1 wrote:Also, is the size a more significant factor in determining this than the state that the molecule is in?


I have this same question.

Re: Molar Entropy

Posted: Sun Mar 11, 2018 11:12 pm
by AtreyiMitra2L
Generally, the heavier the substance, the higher the molar entropy. This occurs because the energy levels are closer together, which means there are more possible orientations the substance can acquire. Therefore, it will have a higher molar entropy.

Re: Molar Entropy

Posted: Sun Mar 11, 2018 11:45 pm
by 604807557
Large = more complex = more possible orientations = higher entropy
Small = less complex = less possible orientations = lower entropy

Re: Molar Entropy

Posted: Tue Mar 13, 2018 6:36 pm
by Jacquelyn Hill 1
Between a solid and liquid, which substance would have a higher molar entropy? Would a heavy solid have a higher or lower molar entropy than a lighter liquid or vice versa? Would a lighter solid have a higher or lower molar entropy than a heavy liquid?

Re: Molar Entropy

Posted: Thu Feb 07, 2019 8:42 pm
by Lorena Zhang 4E
The mass is definitely a determining factor. However, we usually consider degeneracy first then the mass of the molecule.