A 042-Kg Quantity of Ethanol,in the Liquid State at Its Melting

question 18

Multiple Choice

A 0.42-kg quantity of ethanol,in the liquid state at its melting point of -114.4°C,is frozen at atmospheric pressure.The heat of fusion of ethanol is 1.04 × 10⁵ J/kg,and its molecular mass is 46.1 g/mol.What is the change in the entropy of the ethanol as it freezes?

• A)-280 J/K
• B)-250 J/K
• C)-310 J/K
• D)250 J/K
• E)280 J/K

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