## Molar entropy

$\Delta U=q+w$

Ashley Bouma 1F
Posts: 30
Joined: Fri Sep 28, 2018 12:21 am

### Molar entropy

How do you decide which diatomic molecule has a higher molar entropy at the same temp? For example HBr or HF?

Kevin ODonnell 2B
Posts: 62
Joined: Fri Sep 28, 2018 12:24 am

### Re: Molar entropy

From the trend I believe there is a decrease in the entropy as the forces between the atoms, molecules, or ions increases. A good example is the three solid compounds NaF with the molar entropy 51.5, MgO at 26.8, and AlN at 20.2

Douglas Nguyen 2J
Posts: 71
Joined: Fri Sep 28, 2018 12:15 am

### Re: Molar entropy

In that instance, you can determine which has a higher molar entropy with which one has greater mass, and since it has greater mass, it also has more elementary particles!