54. Butanol and pentane have approximately the same molar mass. However, the viscosity at 20 C of butanol is 2.948 cP, and the viscosity of pentane is 0.240 cP. Which of the following statements best explains this difference? (1 cP 0.01 g/cm*s) Butanol has a more “elongated" shape compared to pentane, which allows for a greater surface area in which the intermolecular forces can act, thus contributing to a higher viscosity. Butanol has stronger intermolecular forces than pentane because it has the ability to form hydrogen bonds, which would contribute to a higher viscosity.
54. Butanol and pentane have approximately the same molar mass. However, the viscosity at 20 C of butanol is 2.948 cP, and the viscosity of pentane is 0.240 cP. Which of the following statements best explains this difference? (1 cP 0.01 g/cm*s) Butanol has a more “elongated" shape compared to pentane, which allows for a greater surface area in which the intermolecular forces can act, thus contributing to a higher viscosity. Butanol has stronger intermolecular forces than pentane because it has the ability to form hydrogen bonds, which would contribute to a higher viscosity.
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ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
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Chapter1: Chemical Foundations
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Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Choose the correct statement and best answer that explains the difference in viscosity.
Transcribed Image Text:54. Butanol and pentane have approximately the same molar mass. However, the
viscosity at 20 C of butanol is 2.948 cP, and the viscosity of pentane is 0.240 cP.
Which of the following statements best explains this difference? (1 cP = 0.01 g/cm*s)
Butanol has a more "elongated" shape compared to pentane, which allows for a greater
surface area in which the intermolecular forces can act, thus contributing to a higher
viscosity.
Butanol has stronger intermolecular forces than pentane because it has the ability to form
hydrogen bonds, which would contribute to a higher viscosity.
Butanol and pentane have different critical points and triple points, which severely
impacts the properties of these substances at a specified temperature.
The molar mass of butanol is approximately 2 amu larger than that of pentane. Viscosity
is strongly dependent on molar mass, so this seemingly small difference can account for a
large change in viscosity.
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