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

question 45

Multiple Choice

Ethanol (CH₃CH₂OH) has been suggested as an alternative fuel source. Ethanol's enthalpy of combustion is 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:

Sympatric Speciation

The process of speciation that occurs when populations of a species that share the same habitat diverge into separate species without physical separation.

Cichlid Fishes

A diverse group of fish known for their interesting behaviors, including their complex mating rituals and parental care.

Geological Strata

Layers of sedimentary rock or soil with internally consistent characteristics that distinguish them from adjacent layers.

Primitive

Referring to the early and undeveloped stage in the evolution of something.