In which of the following processes entropy increases?

A. A liquid evaporates to vapour.
B. Temperature of a crystalline solid lowered from 130 K to 0 K.
C. \(2{\mathrm{NaHCO}}_{3(\mathrm{s})}\to {\mathrm{Na}}_{2}{\mathrm{CO}}_{3(\mathrm{s})}+{\mathrm{CO}}_{2(\mathrm{g})}+{\mathrm{H}}_{2}{\mathrm{O}}_{(\mathrm{g})}\)
D. \({\mathrm{Cl}}_{2(\mathrm{g})}\to 2{\mathrm{Cl}}_{(\mathrm{g})}\)

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[NEET 2024]

Question

In which of the following processes entropy increases?

A. A liquid evaporates to vapour.
B. Temperature of a crystalline solid lowered from 130 K to 0 K.
C. \(2{\mathrm{NaHCO}}_{3(\mathrm{s})}\to {\mathrm{Na}}_{2}{\mathrm{CO}}_{3(\mathrm{s})}+{\mathrm{CO}}_{2(\mathrm{g})}+{\mathrm{H}}_{2}{\mathrm{O}}_{(\mathrm{g})}\)
D. \({\mathrm{Cl}}_{2(\mathrm{g})}\to 2{\mathrm{Cl}}_{(\mathrm{g})}\)

Choose the correct answer from the options given below

[NEET 2024]

YESPYQ · Accepted Answer

Correct answer: d) A, C and D. A : Liquid → vapour = increase in randomness ⇒ entropy increases B : Cooling to 0 K decreases entropy C : Solid decomposes → gases form ⇒ entropy increases D : 1 mole gas → 2 moles gas ⇒ entropy increases

In which of the following processes entropy increases? A. A liquid evaporates to vapour. B. Temperature of a crystalline…

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