1.

The entropy change can be calculated by using the expression `DeltaS-(q_(rev))/(T)`. When water freezes in a glass beaker, choose the correct statement amongst the following:A. `Delta S_(("system"))` decreases but `Delta S_(("surroundings"))` remains the sameB. `Delta S_(("system"))` increases but `Delta S_(("surroundings"))` decreasesC. `Delta S_(("system"))` decreases but `Delta S_(("surroundings"))` increasesD. `Delta S_(("system"))` decreases but `Delta S_(("surroundings"))` also decrease

Answer» Correct Answer - C
During the process of freezing energy is released, which is absorbed by the surroundings
`:. Delta S_("system") = (-q_(rev))/(T)`,
`Delta S_("surroundings") = (q_(rev))/(T)`
Therefore the entropy of the system decrease and that of surroundings increases


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