Chapter 16, Problem 74QRT

(a)

Interpretation Introduction

Interpretation:

The value of ${\Delta }_{\text{r}}G°$ for the reaction, $\frac{1}{8}{\text{S}}_8\left(\text{s}\right)+{\text{O}}_2\left(g\right)\rightleftharpoons 2{\text{SO}}_2\left(g\right)$, has to be calculated.

Concept Introduction:

The Gibbs free energy of a system is directly related to the equilibrium constant of a reaction.  The Gibbs free energy of the system is a state function as it is defined in terms of thermodynamic properties that are state functions.  The symbol for equilibrium constant is $K_{\text{P}}$.

(b)

Interpretation Introduction

Interpretation:

The value of ${\Delta }_{\text{r}}G°$ for the reaction, ${\text{2H}}_2\left(g\right)+{\text{O}}_2\left(g\right)\rightleftharpoons 2{\text{H}}_2\text{O}\left(g\right)$, has to be calculated.

Concept Introduction:

Refer to concept of part (a).

(c)

Interpretation Introduction

Interpretation:

The value of ${\Delta }_{\text{r}}G°$ for the reaction, ${\text{CH}}_4\left(g\right)+{\text{H}}_2\text{O}\left(g\right)\rightleftharpoons \text{CO}\left(g\right)+3{\text{H}}_2\left(g\right)$, has to be calculated.

Concept Introduction:

Refer to concept of part (a).