## Entropy equation

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

Ellen Amico 2L
Posts: 101
Joined: Thu Sep 19, 2019 12:16 am

### Entropy equation

Can someone explain the concept behind the ∆S = q/T equation? I'm confused on what it really means and when to use it.

Daniel Honeychurch1C
Posts: 109
Joined: Thu Jul 11, 2019 12:15 am

### Re: Entropy equation

The change in entropy is calculated by dividing the amount of energy transferred as heat (reversibly) with the temperature
(when the temperature is constant). This equation tells us that entropy increases more at lower temperatures than higher temperatures for a given amount of heat transferred.

Hui Qiao Wu 1I
Posts: 56
Joined: Fri Aug 30, 2019 12:16 am

### Re: Entropy equation

You use this equation if only heat and temperature are given in the problem. If you do not have enough information to solve for entropy with the other equations involving constant pressure, temperature, or volume, this might be the one to use.