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Ethanol (C2H5OH)melts at -114°C

Question 30

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) -12.7
C) 6.91
D) 4192
E) 9.21

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