Molar Entropy

[Jacquelyn Hill 1]

Is the size of a molecule significant in determining whether it has a higher molar entropy than another molecule?

[Alyssa Pelak 1J]

Yes! A larger molecule has a higher molar entropy. This is because it is more complex and has more electrons.

[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.

[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.

[Jacquelyn Hill 1]

Also, is the size a more significant factor in determining this than the state that the molecule is in?

[Mishta Stanislaus 1H]

Also, is the size a more significant factor in determining this than the state that the molecule is in?

I have this same question.

[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.

[604807557]

Large = more complex = more possible orientations = higher entropy
Small = less complex = less possible orientations = lower entropy

[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?

[Lorena Zhang 4E]

The mass is definitely a determining factor. However, we usually consider degeneracy first then the mass of the molecule.