## qrev

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

Maria Bajenov 1I
Posts: 28
Joined: Fri Sep 29, 2017 7:06 am

### qrev

I'm confused as to what you insert for qrev in delta S? Is it -delta H or nCdeltaT? How do you know when to use which?

Shawn Patel 1I
Posts: 54
Joined: Thu Jul 27, 2017 3:01 am

### Re: qrev

Hey,
Usually qrev will be given as a value in J transferred or absorbed as heat.

Posts: 54
Joined: Thu Jul 27, 2017 3:00 am
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### Re: qrev

Just to add on to what Shawn said, q is the energy transferred as heat, and the subscript rev indicates that the energy must be transferred reversibly.

Diane Bui 2J
Posts: 61
Joined: Sat Jul 22, 2017 3:00 am

### Re: qrev

It also depends on whether you are referring to the system or surroundings.