Ncert Exercises & Solutions

The entropy change can be calculated by using the expression $∆ S = \frac{q_{rev}}{T}$ . When water freezes in a glass beaker, the correct statement among the following is:

1.	∆ S (system) decreases but ∆ S (surroundings) remains the same.
2.	∆ S (system) increases but ∆ S (surroundings) decreases.
3.	∆ S (system) decreases but ∆ S (surroundings) increases.
4.	∆ S (system) decreases but ∆ S (surroundings) also decreases.

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