Chapter 19, Problem 77IAE

Interpretation Introduction

(a)

Interpretation:

The theoretical energy consumption per 1000 kg Cl₂ produced in a diaphragm chlor-alkali cell that operates at 3.45 V should be expressed in kJ.

Concept introduction:

Chlor-alkali process named using the names of two principal products: chlorine and alkali NaOH.

The cell reaction is represented as follows:

${\text{2Cl}}^{\text{-}}{\text{(aq) + 2H}}_{\text{2}}\text{O(l)}\to {\text{2OH}}^{\text{-}}{\text{(aq) + H}}_{\text{2}}{\text{(g) + Cl}}_{\text{2}}{\text{(g) E}}^0{}_{cell}=-2.19\text{ V}$

$\begin{array}{l}\text{Volts ×Coulomb = Joules}\hfill \\ \text{1 mole of electron = 96485 C}\hfill \end{array}$

Interpretation Introduction

(b)

Interpretation:

The theoretical energy consumption per 1000 kg Cl₂ produced in a diaphragm chlor-alkali cell that operates at 3.45 V should be expressed in kilowatt-hours (kWh).

Concept introduction:

Chlor-alkali process named using the names of two principal products: chlorine and alkali NaOH.

The cell reaction is;

${\text{2Cl}}^{\text{-}}{\text{(aq) + 2H}}_{\text{2}}\text{O(l)}\to {\text{2OH}}^{\text{-}}{\text{(aq) + H}}_{\text{2}}{\text{(g) + Cl}}_{\text{2}}{\text{(g) E}}^0{}_{cell}=-2.19\text{ V}$

$\begin{array}{l}\text{Volts ×Coulomb = Joules}\hfill \\ \text{1 mole of electron = 96485 C}\hfill \end{array}$

Also,

$\text{1 Wh }=36\text{00 J}$