Chapter 11.4, Problem 11.8PSP

Interpretation Introduction

Interpretation:

An energy level diagram has to be drawn for the reaction between $NO$ and $C{l}_2.$  The nature of the reaction, means whether it is an exothermic reaction or an endothermic reaction has to determined.

Concept Introduction:

The change in enthalpy in a reaction can be calculated as given below.

  ${\Delta }_r{H}^{\circ }=E_a\left(forward\right)-E_a\left(backward\right)$

If the sign of ${\Delta }_r{H}^{\circ }$ is negative, then it is an exothermic reaction.  If the sign of ${\Delta }_r{H}^{\circ }$ is positive, then it is an endothermic reaction.