Chapter 3, Problem 3D.3P

Interpretation Introduction

Interpretation:

The thermodynamic cycle for the reaction $\frac{1}{2}{\text{H}}_{\text{2}}\left(\text{g}\right)+\frac{1}{2}{\text{I}}_{\text{2}}\left(\text{s}\right)\to {\text{H}}^{\text{+}}\left(\text{aq}\right)+{\text{I}}^{-}\left(\text{aq}\right)$ has to be drawn and the standard Gibbs free energy of formation of ${\text{I}}^{-}\left(\text{aq}\right)$ has to be calculated.

Concept introduction:

The Gibbs free energy of the system represents the maximum amount of non-expansion work achieved by a thermodynamic system at isothermal and isobaric conditions.  The change in Gibbs free energy is used to predict the spontaneous of the process.  The change in Gibbs energy of the system is mathematically is represented as shown below.

  $\Delta G=\Delta H-T\Delta S$