A 677-g quantity of a substance is at its melting point of -115.8C in the liquid...

 

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A 677-g quantity of a substance is at its melting point of -115.8C in the liquid state. The heat of fusion of ethanol is 1.68 x 105 J/kg, the molecular mass is 36.9 g/mol, and the ideal gas constant is R = 8.314 J/(mol-K). The change in the entropy of the substance as it freezes is closest to A 677-g quantity of a substance is at its melting point of -115.8C in the liquid state. The heat of fusion of ethanol is 1.68 x 105 J/kg, the molecular mass is 36.9 g/mol, and the ideal gas constant is R = 8.314 J/(mol-K). The change in the entropy of the substance as it freezes is closest to