Chapter 21, Problem 21.111CHP

Interpretation Introduction

Interpretation:

The standard free energy change of iron has to be calculated.  Also the possibility of formation of iron by decomposition of iron oxide has to be explained.

Concept introduction:

Gibbs free energy:

The change in free energy is given as

${\text{ΔG}}^{\text{0}}\text{=}{\text{ΔH}}^{\text{0}}\text{-}{\text{TΔS}}^{\text{0}}$

Where,

${\text{ΔG}}^{\text{0}}$ is standard free energy change.

${\text{ΔH}}^{\text{0}}$ is standard enthalpy change.

${\text{ΔS}}^{\text{0}}$  is standard entropy change.