Ethanol (C₂H₅OH)melts at -114 °C

question 76

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 -135 °C to liquid ethanol at -50 °C?

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

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