## Entropy

$\Delta S = \frac{q_{rev}}{T}$

Olivia Young 1A
Posts: 60
Joined: Fri Sep 28, 2018 12:24 am

### Entropy

Why don't deltaU or deltaH fully describe the system? So, why is entropy necessary to describe the system and what information does it provide?

Cole Elsner 2J
Posts: 88
Joined: Fri Sep 28, 2018 12:25 am

### Re: Entropy

Delta U and delta H do not fully describe the system without entropy. Entropy is the likelihood (probability) a system will be in a particular start. The combination of delta U delta h and entropy can give more information as to how the system will change.

Catly Do 2E
Posts: 64
Joined: Fri Sep 28, 2018 12:24 am

### Re: Entropy

DeltaU describes the change in internal energy of a system and DeltaH describes the change in total heat content of the system. Entropy is the measure of uncertainty, which is very significant in describing a system.