A) \[\Delta \,{{S}_{system}}+\Delta {{S}_{surroundings}}>0\]
B) \[\Delta \,{{S}_{system}}-\Delta {{S}_{surroundings}}>0\]
C) \[\Delta \,{{S}_{system}}>0\]only
D) \[\Delta {{S}_{surroundings}}>0\]only
Correct Answer: A
Solution :
For spontaneous process, \[\Delta S\]must be positive. In reversible process \[{{\Delta }_{system}}+\Delta {{S}_{surrounding}}=0\] Hence, system is present in equilibrium. (i.e., it is not spontaneous process) While in irreversible process \[{{\Delta }_{system}}+\Delta {{S}_{surrounding}}>0\] Hence, in the process \[\Delta S\]is positive.
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