## entropy chnage

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

Lauryn Jordan 1F
Posts: 76
Joined: Fri Sep 29, 2017 7:07 am

### entropy chnage

in question 9.5 why is it -50 j.k? can someone explain where the negative came from

Sarah Sharma 2J
Posts: 33
Joined: Fri Sep 29, 2017 7:05 am

### Re: entropy chnage

Its negative because the reservoir that was at 800K in the transfer of heat is the reservoir that is losing heat, therefore it is negated in the process. The end results should come out to about
200J + -50J = 150J! Hope it helps!