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For which of these processes is the valu...

For which of these processes is the value of `Delta S` negative?
i. Sugar is dissolved in water.
ii. Steam condenses on a surface.
iii. `CaCO_(3)` is decomposed into `CaO` and `CO_(2)`.

A

i only

B

ii only

C

ii and iii only

D

ii and iii only

Text Solution

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To determine for which of the given processes the value of ΔS (change in entropy) is negative, we will analyze each process one by one. ### Step 1: Analyze the first process - Dissolving sugar in water - **Initial State**: Sugar (C₁₂H₂₂O₁₁) is in solid form. - **Final State**: Sugar is dissolved in water (aqueous form). - **Entropy Consideration**: The entropy of a solid is generally lower than that of a liquid. When sugar dissolves, it transitions from a solid state to a more disordered aqueous state. - **Conclusion**: Since the entropy increases during this process, ΔS is positive. ...
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