Chapter 25, Problem 25.14P

a)

Interpretation Introduction

Interpretation:

The factor that increases the pressure to maintain constant linear velocity has to be calculated.

Concept Introduction:

Column Pressure:

The pressure that is necessary to drive the solvent through a column can be calculated as,

$\text{P=f}\frac{{\text{u}}_{\text{v}}\text{ηL}}{{\text{πr}}^{\text{2}}{\text{d}}_{\text{p}}{}^{\text{2}}}$

Here, ${\text{u}}_{\text{v}}$ = volume of the flow rate

$\text{η}$ = viscosity of the solvent

$\text{L}$ = Length of the column

$\text{r}$ = column radius

${\text{d}}_{\text{p}}$ = diameter of the particle

$\text{f}$ depends on shape and packing of particle

b)

Interpretation Introduction

Interpretation:

The factor at which the linear velocity will be raised if pressure of the column is increased by factor of 10 has to be calculated.

Concept Introduction:

Column Pressure:

The pressure that is necessary to drive the solvent through a column can be calculated as,

$\text{P=f}\frac{{\text{u}}_{\text{v}}\text{ηL}}{{\text{πr}}^{\text{2}}{\text{d}}_{\text{p}}{}^{\text{2}}}$

Here, ${\text{u}}_{\text{v}}$ = volume of the flow rate

$\text{η}$ = viscosity of the solvent

$\text{L}$ = Length of the column

$\text{r}$ = column radius

${\text{d}}_{\text{p}}$ = diameter of the particle

$\text{f}$ depends on shape and packing of particle

c)

Interpretation Introduction

Interpretation:

The reason for the permit of small particles 10-flod faster flow without losing their efficiency or with improved efficiency has to be explained.