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A spherical ball of solid, nonporous naphthalene, a "moth ball," is suspended in still air. The naphthalene ball slowly sublimes, releasing the naphthalene into the surrounding air by a diffusion limited
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A spherical ball of solid, nonporous naphthalene, a "moth ball," is suspended in still air. The naphthalene ball slowly sublimes, releasing the naphthalene into the surrounding air by a diffusion limited process.

1. Estimate the time required to reduce the diameter from 2 cm to 0.5 cm. when the surrounding air is at 347 K and 1.013 x 10^5 Pa. Naphthalene has a molecular weight of 128 g/mole, a solid density of 1.145 g/cm^3, a diffusion coefficient in air of 8.19 x 10^-6 m^2/s, and exerts a vapor pressure of 5 torr (670 Pa) at 347 K.

User Dawid Adach
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Answer:

61.6 hours will be needed to reduce the diameter of solid spherical ball from 2 cm to 0.50 cm.

Step-by-step explanation:

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A spherical ball of solid, nonporous naphthalene, a "moth ball," is suspended-example-1
A spherical ball of solid, nonporous naphthalene, a "moth ball," is suspended-example-2
A spherical ball of solid, nonporous naphthalene, a "moth ball," is suspended-example-3
User Dejay Clayton
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