Highest molar entropy (textbook)

[dana hu 1B]

Hello,

Why is HBr gas has a higher molar entropy at 298K than HF gas?
Both have two atom and 2 position at same pressure and state. What other factors should I be considering?\

Thank you!

[Jonathan Haimowitz 3B]

HBr has more electrons than HF, meaning that the electrons have more possible microstates, which increases molar entropy.

[Chesca Legaspi 2E]

To go along with the last response, larger molecules typically have higher molar entropy values and seeing as Br is larger than F, HBr has a higher molar entropy.

[Kiran Marla]

Generally, molecules with a higher molar weight and more complex structure will have higher molar entropy.

[tholz11]

Higher molar entropy is linked to more complex and larger molecules. Think about what would give a high w value, more ways to organize a structure (-: