JEE Mains · Chemistry · STD 11 - 5. Thermodynamics and thermochemistry
During which of the following processes, does entropy decrease ? \((A)\) Freezing of water to ice at \(0^{\circ} C\) \((B)\) Freezing of water to ice at \(-10^{\circ} C\) \((C)\) \(N _{2}( g )+3 H _{2}( g ) \rightarrow 2 NH _{3}( g )\) \((D)\) Adsorption of \(CO ( g )\) and lead surface \((E)\) Dissolution of \(NaCl\) in water
- A \((A), (B), (C)\) and \((D)\) only
- B \((B)\) and \((C)\) only
- C \((A)\) and \((E)\) only
- D \((A), (C)\) and \((E)\) only
Answer & Solution
Correct Answer
(A) \((A), (B), (C)\) and \((D)\) only
Step-by-step Solution
Detailed explanation
\((A)\) Water \(\stackrel{0^{\circ} C }{\longrightarrow}\) ice \(; \Delta S =- ve\) \((B)\) Water \(\stackrel{-10^{\circ} C }{\longrightarrow}\) ice; \(\Delta S =- ve\) \((C)\) \(N _{2}( g )+3 H _{2}( g ) \rightarrow 2 NH _{3}( g ) ; \Delta S =- ve\) \((D)\) Adsorption;…
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