Chapter 23, Problem 23.86P

(a)

Interpretation Introduction

Interpretation:

Value of ${\text{ΔG}}_{\text{rxn}}$ has to be determined for the formation reaction of $HCl$.

Concept Introduction:

The Gibbs free energy or the free energy change is a thermodynamic quantity represented by $\text{ΔG}$.

The formula of ${\text{ΔG}}_{\text{rxn}}$ in terms of thermodynamic reaction quotient (Q),

    ${\text{ΔG}}_{rxn}={\text{ΔG}}_{rxn}^o+\text{RT}\text{ln Q}$

(b)

Interpretation Introduction

Interpretation:

The formation reaction of $HCl$ when the partial pressure are $P_{H_2}=\text{3}\text{.5 bar,}\text{}{P}_{C{l}_2}=1.\text{5 bar}$ and $P_{HCl}=0.31\text{ bar}$ is whether more or less favorable than that under standard state conditions has to be given.