Considering entropy $(S)$ as a thermodynamic parameter,what are the necessary conditions for a process to be spontaneous?
- A$\Delta S_{\text{system}} - \Delta S_{\text{surroundings}} > 0$
- B$\Delta S_{\text{system}} > 0$
- C$\Delta S_{\text{surroundings}} > 0$
- D$\Delta S_{\text{system}} + \Delta S_{\text{surroundings}} > 0$
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Which of the following statements is correct?
Direct conversion of $A$ to $B$ is difficult,so it is carried out by the path shown below. If $e.u.$ is the entropy unit,what will be $\Delta S_{(A \rightarrow B)}$?
Given:
$\Delta S_{(A \rightarrow C)} = 50 \ e.u.$
$\Delta S_{(C \rightarrow D)} = 30 \ e.u.$
$\Delta S_{(B \rightarrow D)} = 20 \ e.u.$
Given:
$\Delta S_{(A \rightarrow C)} = 50 \ e.u.$
$\Delta S_{(C \rightarrow D)} = 30 \ e.u.$
$\Delta S_{(B \rightarrow D)} = 20 \ e.u.$
DifficultIIT 2006
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