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  4. When water is cooled to ice, its entropy

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Q. When water is cooled to ice, its entropy

J & K CETJ & K CET 2010Thermodynamics

Solution:

Entropy is the measure of randomness. When water (liquid) is cooled to ice (solid) randomness decreases
( $\because$ in solids, molecules are orderly arranged), and thus, entropy decreases.