What is the entropy change (in $\mathrm{JK}^{-1} \mathrm{~mol}^{-1}$ ) when one mole of ice is converted…

What is the entropy change (in $\mathrm{JK}^{-1} \mathrm{~mol}^{-1}$ ) when one mole of ice is converted into water at $0^{\circ} \mathrm{C}$ ? (The enthalpy change for the conversion of ice to liquid water is $6.0 \mathrm{~kJ} \mathrm{~mol}^{-1}$ at $0^{\circ} \mathrm{C}$ )
  1. 20.13
  2. 2.013
  3. 2.198
  4. 21.98

Solution

$\mathrm{S}=\frac{q_{r e v}}{\mathrm{~T}}=\frac{6000}{273}$ $=21.978=21.98 \mathrm{JK}^{-1} \mathrm{~mol}^{-1}.$

Asked in: NEET 2003

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