Without referring to a data table, rank the following compounds by standard molar entropy. HF(g), F2(g), Ne(g)

Question

Hello, would anybody be able to help me out and explain how to work this problem?

 

Without referring to a data table, rank the following compounds by standard molar entropy.

 

HF(g), F₂(g), Ne(g)

Answer 1

Standard molar entropy is an extensive property, meaning that it is related to the amount of substance present. In general (but with exceptions), molar entropy increases with molar mass.  Thus, one would expect the following order :

N₂ > Ne > HF