Ethanol ( OH)melts at -114 °C

question 34

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/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 -60 °C?

• A)207.3
• B)-13.3
• C)6.34
• D)3617
• E)8.63

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Definitions:

Male

Referring to the sex that produces small, mobile gametes (sperm) in sexually reproducing species, typically associated with XY chromosome configuration in mammals.

Unconditioned Response

A natural, automatic reaction to a stimulus that occurs without prior conditioning or learning.

Pavlov

A Russian physiologist known for his work on classical conditioning, demonstrating the concept of the conditioned reflex.

Classical Conditioning

An educational method where two signals are consistently associated together, leading to a reaction initially triggered by the second signal but ultimately provoked by just the first signal.