Chapter 13, Problem 13.36CP

(a)

Interpretation Introduction

Interpretation:

A balanced chemical reaction for the given reaction has to be written.

Concept introduction:

Balanced Chemical equation:

A balanced chemical equation is an equation which contains same elements in same number on both the sides (reactant and product side) of the chemical equation thereby obeying the law of conservation of mass.

(b)

Interpretation Introduction

Interpretation:

The change in concentration of A molecule has to be explained.

Concept introduction:

Le Chatelier's principle states that if a system in equilibrium gets disturbed due to modification of concentration, temperature, volume, and pressure, then it reset to counteract the effect of disturbance.

Effect of change in temperature:

Endothermic reaction: In this reaction increase in temperature which is absorbed in reactant side, the reaction occurs in a way to relieve the stress in reactant side. The reaction occurs along the direction of product side and increases equilibrium constant.

Exothermic reaction: In this reaction increase in temperature which is released in product side, the reaction occurs in a way to relieve the stress in product side. The reaction occurs along the direction of reactant side and decreases equilibrium constant.

Effect of change in pressure:

• According to Le Chatelier's principle, increase in pressure leads to flow of reaction in direction where number of moles is less.
• According to Le Chatelier's principle, decrease in pressure leads to flow of reaction in direction where number of moles is more.