MCQ
For the process, $\ce{H_2O(l) \rightarrow H_2O(g) }$ at $T = 100^\circ C$ and $1$ atm, the correct choice is :
  • A
    $\Delta\text{S}_\text{System} > 0$ and $\Delta\text{S}_\text{Surr} < 0$
  • $\Delta\text{S}_\text{System} > 0,\ \Delta\text{S}_\text{Surr} > 0$
  • C
    $\Delta\text{S}_\text{System} < 0$  and $\Delta\text{S}_\text{Surr} > 0$
  • D
    $\Delta\text{S}_\text{System} < 0,\ \Delta\text{S}_\text{Surr} < 0$

Answer

Correct option: B.
$\Delta\text{S}_\text{System} > 0,\ \Delta\text{S}_\text{Surr} > 0$
Entropy of system is increasing and of surroundings decreasing.

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