Ethanol ( C₂H₅OH)melts at -114 °C

question 90

Multiple Choice

Ethanol ( C₂H₅OH) 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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