A 810-g quantity of ethanol,in the liquid state at its melting point of
is frozen at atmospheric pressure.The heat of fusion of ethanol is 1.04 × 105 J/kg,the molecular mass is 46.1 g/mol,and the ideal gas constant is R = 8.314 J/(mol ∙ K) .The change in the entropy of the ethanol as it freezes is closest to
A) -540 J/K.
B) -490 J/K.
C) -600 J/K.
D) 490 J/K.
E) 540 J/K.
Correct Answer:
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