Ethanol ( OH)melts at -114°C

question 50

Multiple Choice

Ethanol ( OH) 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/gK and 2.3 J/gK,respectively.How much heat (kJ) is needed to convert 25.0 g of solid ethanol at -125°C to liquid ethanol at -80°C?

• A) 207.3 kJ
• B) -14.2 kJ
• C) 4.95 kJ
• D) 2224 kJ
• E) 7.24 kJ

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