Chapter 5, Problem 5.34P

Interpretation Introduction

(a)

Interpretation:

The concentration gradient of Hydrogen needs to be determined.

Concept Introduction:

The concentration gradient can be calculated as follows:

  $\begin{array}{c}\text{concentraiton gradient}=\frac{c_i-c_s}{\Delta x}\\ =\frac{c_i-c_s}{\Delta x}\mathrm{...........}\left(1\right)\end{array}$

Interpretation Introduction

(b)

Interpretation:

The flux of hydrogen through the foil needs to be determined.

Concept Introduction:

The flux of hydrogen through the foil can be calculated the using the Fick's First Law equation as given below.

  $J=-D\frac{dc}{dx}$