JEE Mains · Chemistry · STD 11 - 5. Thermodynamics and thermochemistry
The entropy change associated with the conversion of \(1\,kg\) of ice at \(273\,K\) to water vapours at \(383\,K\) is: (Specific heat of water liquid and water vapours are \(4.2\,kJ\,K^{-1}\,kg^{-1}\) and \(2.0\,kJ\,K^{-1}\,kg^{-1},\) heat of liquid fusion and vapourisation of water are \(334\,kJ\,kg^{-1}\) and \(2491\,kJ\,kg^{-1},\) respectively) \((log\,273 = 2.436,\,log\,373 = 2.572,\,log\,383 = 2.583)\) ......\(kJ\,K^{-1}\,kg^{-1}\)
- A \(7.90\)
- B \(2.64\)
- C \(8.49\)
- D \(9.26\)
Answer & Solution
Correct Answer
(D) \(9.26\)
Step-by-step Solution
Detailed explanation
\mathop {\mathop {{H_2}O(s)}\limits_{1\,kg} }\limits_{at\,273\,K} \to \mathop {\mathop {{H_2}O(l)}\limits_{1\,kg} }\limits_{at\,273\,K} \to \mathop {\mathop {{H_2}O(l)}\limits_{1\,kg} }\limits_{at\,373\,K} \to \mathop {\mathop {{H_2}O(g)}\limits_{} }\limits_{at\,373\,K} \to…
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