## Change in the entropy of the universe

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

Ryan Cerny 3I
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### Change in the entropy of the universe

For dStotal = dSsys + dSsurr what conditions make dStotal = to 0?

Amber Duong 1B
Posts: 10
Joined: Wed Sep 21, 2016 2:55 pm

### Re: Change in the entropy of the universe

If temperature is constant for the system and its surroundings, the entropy for both are equal and opposite values. For example, the system losing heat is a negative entropy value while the surroundings gain that heat and have the opposite, positive entropy value. Thus, total entropy change of the universe is 0.