Multiple choice

Which one of the following systems has maximum entropy?

  1. One mole of water vapour

  2. One mole of liquid water

  3. One mole of solid water

  4. One mole of water at triple point.
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A Correct answer
Explanation

Entropy is a measure of disorder, and gases have the highest entropy among the three states of matter. Water vapour (gas) has maximum entropy compared to liquid water or solid water (ice). At the triple point, water exists in equilibrium between all three phases, giving it less entropy than pure vapour.

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