A-level Chemistry/OCR (Salters)/Entropy

$$ \Delta S_{\mbox{total}} = \Delta S_{\mbox{sys}} + \Delta S _{\mbox{surr}} \,\!$$

$$ \Delta S_{\mbox{surr}} = \frac{ - \Delta H_{\mbox{sys}} }{T} $$

$$ \Delta S_{\mbox{total}} > 0 \,\!$$