Question

In an irreversible process, the value of $\Delta S_{\text{system}}+\Delta S_{\text{surr}}$ is :

• A. $>0$
• B. $<0$
• C. $=0$
• D. all of these

Answer 1

Answer: (A)

$\Delta S_{\text{system }}+\Delta S_{\text{surr }}=\Delta S_{\text{total }}$
So if:
$\Delta S_{\text{total }}>0$, process will be spontaneous or in other word irreversible.
$\Delta S_{\text{total }}<0$, process will not happen
$\Delta S_{\text{total }}=0$, process is in equilibrium.