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darla darla
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5 years ago
Ethanol (  OH) melts at -114C.  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 -125C to liquid ethanol at -80C?
A) 207.3 kJ
B) -14.2 kJ
C) 4.95 kJ
D) 2224 kJ
E) 7.24 kJ
Textbook 
Chemistry: A Molecular Approach

Chemistry: A Molecular Approach


Edition: 4th
Author:
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gugu123gugu123
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#2
4 years ago
Thanks.

Can you help me answer:

Quote
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/gK and 2.3 J/gK, 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
wrote...
#3
3 years ago
Quote from: Daniel Mogollon (4 years ago)
Thanks.

Can you help me answer:

Quote
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/gK and 2.3 J/gK, 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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