Chapter 19, Problem 19A.2AE

Interpretation Introduction

Interpretation:

The argon gas pressure required to create given collision rate at $425K$ on circular path surface with $1.5\text{ mm}$ diameter has to be calculated.

Concept Introduction:

The surface which is exposed to gas gets constantly attacked that result in formation of freshly prepared surface very quickly. This quick formation can be estimated using kinetic theory of gas which derive expression for collision flux, $Z_w$ as follows,

    $Z_w\text{ = }\frac{p}{\sqrt{\left(\frac{2\pi MkT}{N_A}\right)}}$

Here,    p = Pressure

    $N_A$ = Avogadro’s number

    M = Molar mass

    k = Boltzmann’s constant

    T = Temperature.