Question

Calculate the mean free path of an air molecule for a pressure of 10^-6 (10 to the power of -6) torr. Also, calculate the Knudsen number for an evaporation setup for which the source to substrate distance is d = 50 cm. Is this an adequate pressure to use for this evaporation? Why or why not?

Name: calculate the mean free path of an air molecule for a pressure of 10 6 10 to the power of 6 torr also calculate the knudsen number for an evaporation setup for which the source to substrate 21172
Uploaded: 2020-11-24T15:11:33-08:00
Duration: 2 min 48 s
Channel: Khoobchandra Agrawal
Description: calculate the mean free path of an air molecule for a pressure of 10 6 10 to the power of 6 torr also calculate the knudsen number for an evaporation setup for which the source to substrate 21172

          Calculate the mean free path of an air molecule for a pressure of 10^-6 (10 to the power of -6) torr. Also, calculate the Knudsen number for an evaporation setup for which the source to substrate distance is d = 50 cm. Is this an adequate pressure to use for this evaporation? Why or why not?

Added by Richard R.

University Physics with Modern Physics

Hugh D. Young 14th Edition

Instant Answer

Solved by Expert Khoobchandra Agrawal

11/24/2020

Step 1

The mean free path (λ) of a gas molecule can be calculated using the following formula: λ = (k * T) / (√2 * π * d^2 * P) where: λ = mean free path k = Boltzmann constant (1.38 x 10^-23 J/K) T = temperature (in Kelvin) d = diameter of the gas molecule (assumed Show more…

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Calculate the mean free path of an air molecule for a pressure of 10^-6 (10 to the power of -6) torr. Also, calculate the Knudsen number for an evaporation setup for which the source to substrate distance is d = 50 cm. Is this an adequate pressure to use for this evaporation? Why or why not?