Question

When you make ice cubes, the entropy of water

• A. does not change
• B. increases
• C. decreases
• D. may either increase or decrease depending on the process

Answer 1

The correct option is C decreases

Entropy is related to randomness of the particles of the system. More the randomness, more is the entropy.
We know that, in a solid, particles are in less random motion than liquid. Thus, the entropy of a solid is less than of liquid.
Hence, the entropy decreases when we make ice cubes.
$$\begin{array}{c}\text{Why this question?}\\ \text{Tips: Entropy is the measure of randomness}\\ \text{of the particles of the system.}\end{array}$$