Chemistry — Entropy & Spontaneity
Entropy change, the second law and spontaneity criterion.
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\Delta S = \frac{q_{rev}}{T}
\Delta S_{univ} = \Delta S_{sys} + \Delta S_{surr}
\Delta S_{surr} = -\frac{\Delta H}{T}
\Delta G < 0 \Rightarrow \text{spontaneous}