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(B) Entropy change $(\Delta S)$ is negative when the randomness or disorder of the system decreases.$I)$ Sublimation of dry ice $(CO_2(s) \rightarrow

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$II$ and $III$ only

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(B) Entropy change $(\Delta S)$ is negative when the randomness or disorder of the system decreases.$I)$ Sublimation of dry ice $(CO_2(s) \rightarrow CO_2(g))$: Disorder increases,so $\Delta S > 0$.$II)$ Freezing of water $(H_2O(l) \rightarrow H_2O(s))$: The system becomes more ordered,so $\Delta S $III)$ Crystallisation of the dissolved substance: The solute particles move from a disordered solution state to an ordered crystal lattice,so $\Delta S $IV)$ Burning of rocket fuel: This process involves combustion,which produces gaseous products and releases heat,leading to an increase in disorder,so $\Delta S > 0$.Therefore,processes $II$ and $III$ have a negative entropy change.

For which of the following processes is the entropy change $(\Delta S)$ negative?
$I)$ Sublimation of dry ice
$II)$ Freezing of water
$III)$ Crystallisation of the dissolved substance
$IV)$ Burning of rocket fuel

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For which of the following processes is the entropy change $(\Delta S)$ negative?$I)$ Sublimation of dry ice$II)$ Freezing of water$III)$ Crystallisation of the dissolved substance$IV)$ Burning of rocket fuel