Physical Chemistry
2nd Edition
ISBN: 9781133958437
Author: Ball, David W. (david Warren), BAER, Tomas
Publisher: Wadsworth Cengage Learning,
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Chapter 19, Problem 19.37E
Interpretation Introduction
Interpretation:
The value of
Concept introduction:
The mean distance traveled by the same particle between two consecutive collisions is termed as a mean free path. The value of the mean free path of a gas depends on the pressure and temperature of the system. The mean free path of gas is represented as,
Where,
•
•
•
•
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a) At what pressure does the mean free path of argon at 20 °C become comparable to the diameter of a 100 cm3 vessel that contains it? Takeσ = 0.36 nm2.b) At what pressure does the mean free path of argon at 20 °C become comparable to 10 times the diameters of the atoms themselves? Take
σ = 0.36 nm2.
Compare the mean free path of an N2 molecule at an altitude of 15km where the temperature is 217 K and the pressure is 12.1 kPa to the mean free path of N2 molecule at sea level where the temperature is 25°C and 1 atm.
Calculate the root-mean square velocity in centimeters per second of N2 molecules at 270C. Repeat the calculationat 1270C.
Chapter 19 Solutions
Physical Chemistry
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