MCQ
Select the incorrect expression from the following.
  • A
    $\Delta\text{S}_\text{total}=\Delta\text{S}_\text{system}+\Delta\text{S}_\text{surr}$
  • B
    $\Delta\text{S}_\text{surr}=\frac{\Delta\text{H}_\text{surr}}{\text{T}}=-\frac{\Delta\text{H}_\text{sys}}{\text{T}}$
  • $\Delta\text{S}_\text{total} < 0\ ($spontaneous process$)$
  • D
    $\Delta\text{G}=\Delta\text{H}-\text{T}\Delta\text{S}$

Answer

Correct option: C.
$\Delta\text{S}_\text{total} < 0\ ($spontaneous process$)$
For spontaneous process, $\Delta\text{S}_\text{total} > 0$
$\text{T}\Delta\text{S}_\text{system}-\Delta\text{H}_\text{system} > 0$
$-(\Delta\text{H}_\text{system}-\text{T}\Delta\text{S}_\text{system}) > 0$

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