Chapter 9.7, Problem 2QQ

Interpretation Introduction

Interpretation:

From the given options, the one which is not the characteristic of a chemical system in an equilibrium state has to be chosen.

Concept Introduction:

Chemical Equilibrium:

It is a point at which the rate of the forward reaction equals to the rate of backward reaction.  That is, there will be no net change in concentrations.  Chemical equilibrium can also be called as the state at which the rate of forward and backward reactions occur simultaneously at the same rate.  If the rates are equal and there is no net change in the concentration of the reactants and the products, then that state is said to be in dynamic equilibrium. 

Reversible Reaction:

Reaction in which, the product formed get reacts and give back the reactants.  It will attain equilibrium where the concentrations of product and reactant will not change thereafter

Example:

${\text{N}}_{\text{2}}{\text{+3H}}_{\text{2}}\underset{\text{Endothermic}}{\overset{\text{Exothermic}}{\rightleftharpoons }}{\text{2NH}}_{\text{3}}$