Question : When ice cubes are made, the entropy of water ?
Option 1: does not change
Option 2: decreases
Option 3: increases
Option 4: may either increase or decrease depending on the process used
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Correct Answer: decreases
Solution : The correct option is Decreases.
The entropy of water decreases as ice cubes are formed. Entropy tends to rise when substances move from solid to liquid to gas. When water is frozen into ice, the water molecules become more organised and grouped in a crystalline structure. This drop in entropy is caused by a decrease in molecular randomness and enhanced order. As a result, as water freezes to become ice, its entropy reduces.
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