Ethanol (CH₃CH₂OH) Has Been Suggested as an Alternative Fuel Source $\Delta$

question 13

Multiple Choice

Ethanol (CH₃CH₂OH) has been suggested as an alternative fuel source. Ethanol's enthalpy of combustion is $\Delta$ H_comb = -1,368 kJ/mol. What volume of ethanol (d = 0.789 g/mL) is required to produce the same amount of energy as 1 gallon of gasoline, which can be modeled as isooctane (C₈H₁₈) with an energy density of 32.9 kJ/mL? (1 gal = 3.785 L; d = 0.703 g/mL)

• A) 1.41 gal
• B) 1.00 gal
• C) 0.90 gal
• D) 0.85 gal
• E) 1.15 gal

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Definitions:

Chunking Memory

A process by which individual pieces of information are grouped together into larger units, making them easier to remember.

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A cognitive system responsible for temporarily holding and manipulating information necessary for complex tasks such as learning, reasoning, and comprehension.

Larger Units

Larger units refer to comprehensive or expanded quantities, whether measuring physical items, data, or concepts, indicating a scale greater than standard or previously referred to measures.

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The mental representation of visual experiences, including sights, shapes, and colors, which can be recalled or imagined without the stimulus being present.