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Q.

One mole of ice is converted into water at 273K. The entropies of H2O(s) and H2O(l)  are 38.20 and 60.01 Jmol−1K−1 respectively. The enthalpy change for the conversion is

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a

59.54Jmol−1

b

5954Jmol−1

c

595.4Jmol−1

d

320.6Jmol−1

answer is B.

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Detailed Solution

H2O(s)→H2O(1)ΔS=SH2O(l)-SH2O(s)=60.01-38.20=21.81Jmol-1 K-1ΔS=ΔHTΔH273=21.81H=273×21.81=5954.13 J.mol-1
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One mole of ice is converted into water at 273K. The entropies of H2O(s) and H2O(l)  are 38.20 and 60.01 Jmol−1K−1 respectively. The enthalpy change for the conversion is