Chapter 16, Problem 79AE

(a)

Interpretation Introduction

Interpretation:

Expression for equilibrium constant for below reaction has to be given:

  ${\text{X}}_2+2\text{G}\rightleftharpoons {\text{X}}_{\text{2}}{\text{G}}_{\text{2}}$

Concept Introduction:

For equilibrium reaction rate of forward reaction is equal to rate of reverse direction. Consider a general reaction that is as follows:

  $a\text{A}+b\text{B}\rightleftharpoons c\text{C}+d\text{D}$

The expression for equilibrium constant is written as follows:

  $K_{\text{eq}}=\frac{{\left[\text{C}\right]}^c{\left[\text{D}\right]}^d}{{\left[\text{A}\right]}^a{\left[\text{B}\right]}^b}$

Here,

$K_{\text{eq}}$ is equilibrium constant

$\left[\text{A}\right]$, $\left[\text{B}\right]$, $\left[\text{C}\right]$ and $\left[\text{D}\right]$ are concentration of substances in reaction

$a$, $b$, $c$ and $d$ are coefficients of substances

(b)

Interpretation Introduction

Interpretation:

Whether reaction is exothermic or not when temperature increases has to be explained.

Concept Introduction:

The reaction that exhales energy from surrounding in form of light or heat is termed as exothermic reaction. Endothermic reactions are those that absorb energy from the environment as heat.