Ethanol ( OH) Melts at -114 °C

question 48

Multiple Choice

Ethanol ( OH) melts at -114 °C. The enthalpy of fusion is 5.02 kJ mol^-1. The specific heats of solid and liquid ethanol are 0.97 J g^-1 °C^-1 and 2.3 J g^-1 °C^-1, respectively. How much heat (kJ) is needed to convert 25.0 g of solid ethanol at -145 °C to liquid ethanol at -60 °C?

• A) 6.58
• B) 9.96
• C) 8.88
• D) 3859
• E) -13.56

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