Homework II-3

Homework II-3 - HOMEWORK II-3 21.3b At what pressure does...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: HOMEWORK II-3 21.3b At what pressure does the mean free path of argon at 25°C become comparable to the diameters of the atoms themselves? 21.8b A solid surface with dimensions 3.5 mm × 4.0 cm is exposed to helium gas at 111 Pa and 1500 K. How many collisions do the He atoms make with this surface in 10 s? 21.9b An effusion cell has a circular hole of diameter 3.00 mm. If the molar mass of the solid in the cell is 300 g mol −1 and its vapour pressure is 0.224 Pa at 450 K, by how much will the mass of the solid decrease in a period of 24.00 h? 21.13b Use the experimental value of the thermal conductivity of nitrogen ( Table 21-2 ) to estimate the collision cross-section of N 2 molecules at 298 K. 21.21b (complete a only) Calculate the diffusion constant of nitrogen at 25°C and (a) 10.0 Pa, (b) 100 kPa, (c) 15.0 (complete a only) Calculate the diffusion constant of nitrogen at 25°C and (a) 10....
View Full Document

This note was uploaded on 05/01/2011 for the course CHEM 346 taught by Professor Cardelino during the Spring '11 term at Spelman.

Ask a homework question - tutors are online