During which of the following processes, does entropy decrease ?
(A) Freezing of water to ice at $0 ° C$
(B) Freezing of water to ice at $- 10 ° C$
(C) $N_{2} (g) + 3 H_{2} (g) \to 2 {NH}_{3} (g)$
(D) Adsorption of $CO (g)$ and lead surface
(E) Dissolution of $NaCl$ in water

Question

During which of the following processes, does entropy decrease ?

(A) Freezing of water to ice at $0 ° C$
(B) Freezing of water to ice at $- 10 ° C$
(C) $N_{2} (g) + 3 H_{2} (g) \to 2 {NH}_{3} (g)$
(D) Adsorption of $CO (g)$ and lead surface
(E) Dissolution of $NaCl$ in water

TestHub · Accepted Answer

(A) Water ⟶ 0 ° C ice; Δ S = - ve (B) Water ⟶ - 10 ° C ice; Δ S = - ve (C) N 2 ( g ) + 3 H 2 ( g ) → 2 NH 3 ( g ) ; Δ S = - ve (D) Adsorption; Δ S = - ve (E) NaCl ( s ) → Na + ( aq ) + Cl - ( aq ) ; Δ S = + ve

Chemistry - Thermodynamics - II Question with Solution | TestHub

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