Log in
Chemistry
1
answer
0
watching
337
views

Ultra-high-vacuum experiments are routinely performed at a total pressure of 1.0 x 10-10 torr. Calculate the mean free path of N2 molecules and the binary number of collisions, Z11, of N2 molecules (per liter per second) at 350 K under these conditions. The collision diameter of N2 is 3.75 Å.

Watch
1
answer
0
watching
337
views

For unlimited access to Homework Help, a Homework+ subscription is required.

Jarrod Robel
Jarrod RobelLv2
27 Jul 2019

Unlock all answers

Get 1 free homework help answer.
Already have an account? Log in
Share
discord banner image
Join us on Discord
Chemistry Study Group
Join now

Related textbook solutions

Basic Chemistry
5 Edition,
Timberlake
ISBN: 9780134138046
Principles of Chemistry Molecular Approach
4th Edition,
Tro
ISBN: 9780134112831
Chemistry: Structure and Properties
2nd Edition,
Tro
ISBN: 9780134293936
Principles of Chemistry Molecular Approach
3rd Edition, 2014
Tro
ISBN: 9780321971944
Chemistry: A Molecular Approach
3rd Edition,
Tro
ISBN: 9780321809247
Chemistry: A Molecular Approach
5th Edition,
Tro
ISBN: 9780134874371
Principles of Chemistry: A Molecular Approach
4th Edition,
Tro
ISBN: 9780134895741
Chemistry: The Central Science
14th Edition, 2017
Brown
ISBN: 9780134414232

Related questions

Ultra-high-vacuum experiments are routinely performed at a total pressure of 1.0x10-10 Torr.

Estimate (1) the number of collisions of a N2 molecule per second,

(2) the average distance traveled by a N2 molecule between successive collisions at 350 K under these conditions. The collision diameter of N2 is 3.75Ã .

(3) Describe how the result would affect the diffusion rate under such condition compared to that at ambient pressure, where a molecule collides 7.5x109 times per second, and travels 640Ã between collisions on average.

Physical Chemistry II

1. Consider a 1.00 m3 tank containing pure N2 at 20.0°C and 5.00 bar. Assume the N2 molecules are rigid spheres with a diameter of 0.37 nm.

a) What is the mean free path of the N2 molecules in the tank?

b) What is the mean free path of N2 molecules at 20.0°C and 1.0 x 1036 torr (a typical pressure in a vacuum system)?

2. What is the pressure at the top of a 75.0 meter high cylinder containing CO2 at 25.0°C if the pressure at the bottom of the cylinder is 10.00 bar?

3. The thermal conductivity of CH4 gas at 25°C and 1 atm is 3.4 x 1034 J cm31 K31 s31. Estimate the heat per square centimeter that would flow in 10 minutes between two reservoirs as in figure 15.1 connected by a 25 cm long cylinder containing CH4 gas at 1.0 atm. Assume steady state conditions with T2=28°C and T1=24°C.

At an altitude of 30.0 km in the middle of the statosphere, theatmospheric pressure is approximately 0.0130 atm, and the gasdensity is 3.74 x 10^-23 molecules/ m^3, calculate the followingquantities assuming that the air is pure N2(g) whose hard spherecollision radius is 0.19 nm.


(a) the average number of collisions suffered by a singlemolecule of nitrogen in a second.

(b) the total collision frequency Zbb in 1 / (cm^3 s).

(c) the mean free path in miles


Weekly leaderboard

Home
Homework Help 3,900,000
Chemistry 830,000
Start filling in the gaps now
Log in