AP EAMCET · Chemistry · Thermodynamics (C)
For which one of the following reactions, the entropy change is positive?
- A \(\mathrm{H}_2(g)+\frac{1}{2} \mathrm{O}_2(g) \longrightarrow \mathrm{H}_2 \mathrm{O}(l)\)
- B \(\mathrm{Na}^{+}(g)+\mathrm{Cl}^{-}(g) \longrightarrow \mathrm{NaCl}(s)\)
- C \(\mathrm{NaCl}(I) \longrightarrow \mathrm{NaCl}(\mathrm{s})\)
- D \(\mathrm{H}_2 \mathrm{O}(l) \longrightarrow \mathrm{H}_2 \mathrm{O}(\mathrm{g})\)
Answer & Solution
Correct Answer
(D) \(\mathrm{H}_2 \mathrm{O}(l) \longrightarrow \mathrm{H}_2 \mathrm{O}(\mathrm{g})\)
Step-by-step Solution
Detailed explanation
Evaporation of water in an open vessel is a process which takes place by itself, by absorption of heat from the surroundings, because the gaseous water molecules are more random than the liquid water molecules.…
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