Connect nnect Quiz 14C Question 9 (of 10) value: 1.50 points 1 out of 3 attempts

Question

Connect nnect Quiz 14C Question 9 (of 10) value: 1.50 points 1 out of 3 attempts Be sure to answer all parts. The molar heats of fusion and vaporization of ethanol are 7,61 and 26.0 kJ/mol, respectively. Caleulate the molar entropy changes for the solid-liquid and liquid-vapor transitions for ethanol. At 1 atm pressure, ethanol melts at -117.3C and boils at 78.3 C. Solid-liquid transition: kJ/(mol-K) Liquid-vapor transition: kJ(mol K) References eBook&Resources; Multipart Answer Difficulty: Mediu

Explanation / Answer

Molar entropy for fusion for ethanol= 7.61X 10^3J/ (155.7K)= 48.876JK-1 (solid -liquid)

= 0.0489kJK-!mol-1

Molar entropy for vaporization = 26X10^3/(351.3K)= 74.01JK-1 (Liquid -vapor )

= 0.074kJK-1mol-1

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