Chapter 6, Problem 86AE

Interpretation Introduction

Interpretation:Molecular formula of naphthalene is to be determined. Also, percentage of naphthalene that sublimes at equilibrium is to be determined.

Concept introduction:Mole is defined as the ratio of mass of a substance to its molar mass. It is expressed as follows:

  $\text{Moles}=\frac{\text{mass of solute}}{\text{molar mass of solute}}$

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