1. Tardigrade
  2. Question
  3. Chemistry
  4. The value of Δ S is positive for (1) evaporation of water (2) dissolution of sugar in water (3) crystallisation of salt from brine (4) stretching of rubber band

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Q. The value of $\Delta S$ is positive for
(1) evaporation of water
(2) dissolution of sugar in water
(3) crystallisation of salt from brine
(4) stretching of rubber band

BHUBHU 2009

Solution:

Entropy is the measure of randomness. As the randomness increases, entropy increases. The order of entropy is gas $>$ liquid $>$ solid.
Thus, $\Delta S$ is positive, when water is evaporated (ie, liquid converts into gas) and sugar is dissolved in water (ie, solid converts into liquid).