Chapter 18, Problem 18.9P

Interpretation Introduction

Interpretation:

The standard free energy change for the given redox reaction with a standard cell potential of 1.21 V, should be calculated.

Concept introduction:

• Electrochemical cells convert chemical energy to electrical energy and vice versa.
• Redox reactions where both oxidation and reduction occur simultaneously are central to the working of electrochemical cells.
• In the oxidation half reaction, the substance which could be an atom, molecule or ion, loses one or more electrons while in the reduction half reaction, it gains one or more electrons.
• The free energy change is essentially the work done by an electrochemical cell which depends on both the cell potential and the number of electrons involved in the redox reaction.

Given:

The standard cell potential ${\text{(E}}^{\text{o}}\text{)= 1}\text{.21 V}$.