Chapter 16.7, Problem 16.8PSP

(a)

Interpretation Introduction

Interpretation:

The value of the equilibrium constant for the reaction, ${\text{N}}_2\left(\text{g}\right)+{\text{3N}}_2\left(\text{g}\right)\rightleftharpoons 2{\text{NH}}_{\text{3}}\left(\text{g}\right)$, at $298\text{K}$ has to be calculated.

Concept Introduction:

The Gibbs free energy of a system is defined as the enthalpy of the system minus the product of the temperature times the entropy of the system.  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 Gibbs free energy of a system is directly related to the equilibrium constant of a reaction.  The symbol for the equilibrium constant in terms of partial pressure is $K_p$.

(b)

Interpretation Introduction

Interpretation:

The value of the equilibrium constant for the reaction, ${\text{N}}_2\left(\text{g}\right)+{\text{3N}}_2\left(\text{g}\right)\rightleftharpoons 2{\text{NH}}_{\text{3}}\left(\text{g}\right)$, at $450\text{K}$ has to be calculated.

Concept Introduction:

Refer to part (a).

(c)

Interpretation Introduction

Interpretation:

The value of the equilibrium constant for the reaction, ${\text{N}}_2\left(\text{g}\right)+{\text{3N}}_2\left(\text{g}\right)\rightleftharpoons 2{\text{NH}}_{\text{3}}\left(\text{g}\right)$, at $800\text{K}$ has to be calculated.

Concept Introduction:

Refer to part (a).