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Question
Match the following processes with entropy change:
| Reaction | Entropy change |
| (i) A liquid vapourises | (a) ∆S = 0 |
| (ii) Reaction is non-spontaneous at all temperatures and ∆H is positive |
(b) ∆S = positive |
| (iii) Reversible expansion of an ideal gas | (c) ∆S = negative |
Solution
| Reaction | Entropy change |
| (i) A liquid vapourises | (b) ∆S = positive |
| (ii) Reaction is non-spontaneous at all temperatures and ∆H is positive |
(c) ∆S = negative |
| (iii) Reversible expansion of an ideal gas | (a) ∆S = 0 |
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