Chapter 21, Problem 21.62QP

Interpretation Introduction

Interpretation: It should be determined that whether the given reaction is endothermic or exothermic.

Concept Introduction:

• Equilibrium constant is the ratio between the products of partial pressure of the product to the product of partial pressure of reactant.

For a general reaction, $\text{aA}\text{+}\text{bB}\rightleftarrows \text{cC+dD}$ where A and B are reactants and C and D are products.

The equilibrium constant  ${\text{K}}_{\text{p}}\text{=}\frac{{\text{[C]}}^{\text{c}}{\text{[D]}}^{\text{d}}}{{\text{[A]}}^{\text{a}}{\text{[B]}}^{\text{b}}}$

• Equilibrium constant is increases with increase in temperature
• In an exothermic reaction energy will be released as light or heat.
• In an endothermic reaction energy will be absorbed.  
• According with the Le Chatelier’s principle if there is any changes made in a chemical reaction, the system in equilibrium will shift the reaction’s direction to nullify the changes made in the reaction.
• To determine: the relation between equilibrium constant and temperature. .