Ethanol (C₂H₅OH) Melts at - 114°C

question 80

Multiple Choice

Ethanol (C₂H₅OH) melts at - 114°C. The enthalpy of fusion is 5.02 kJ/mol. The specific heats of solid and liquid ethanol are 0.97 J/g- K and 2.3 J/g- K, respectively. How much heat (kJ) is needed to convert 25.0 g of solid ethanol at - 135°C to liquid ethanol at - 50°C?

• A) 207.3
• B) 9.21
• C) - 12.7
• D) 6.91
• E) 4192

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