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Question

Calculate the change in entropy for fusion of 1 mole of ice. The melting point of ice is 273 K and molar enthalpy of fusion for ice = 6.0 kJ mole1

A
Sf =21.97 JK1 mol1
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B
Sf =21.87 JK1 mol1
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C
Sf =21.78 JK1 mol1
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D
Sf =21.79 JK1 mol1
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Solution

The correct option is A Sf =21.97 JK1 mol1
For entropy change of fusion we know that the entropy change is given by, ΔSf=ΔHfT
Given values are, ΔHf=6×103J mol1; T=273K
Therefore ΔSf=(6×103273)
ΔSf =21.97 JK1 mol1

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