JIPMER 2008
- Exam
- JIPMER
- Year
- 2008
- Subject
- Chemistry
- Chapter
- Thermodynamics (C)
JIPMER 2008 · Chemistry · Thermodynamics (C)
The change in entropy for the fusion of 1 mole of ice is [mp of ice...
The change in entropy for the fusion of 1 mole of ice is [mp of ice (=273 \mathrm{~K}), molar enthalpy of fusion for ice (=6.0 \mathrm{~kJ} \mathrm{~mol}^{-1}) ]
Options
- A(11.73 \mathrm{JK}^{-1} \mathrm{~mol}^{-1})
- B(18.84 \mathrm{JK}^{-1} \mathrm{~mol}^{-1})
- C(21.97 \mathrm{JK}^{-1} \mathrm{~mol}^{-1})
- D(24.47 \mathrm{JK}^{-1} \mathrm{~mol}^{-1})
Correct answer
C. (21.97 \mathrm{JK}^{-1} \mathrm{~mol}^{-1})
Step-by-step solution
Entropy change of fusion
\begin{gathered} \Delta S_f=\frac{\Delta H_f}{T}\\
\Delta H_f=60 \times10^3 \mathrm{ J}, \mathrm{ mol}^{-1}, T=273 \mathrm{ K}\\
\Delta S_f=\frac{60 \times 10^3}{273}\\
=21.97 \mathrm{ J} \mathrm{ K}^{-1} \mathrm{ mol}^{-1}
\end{gathered}