Chapter 21, Problem 21.76QP

Interpretation Introduction

Interpretation:

The standard enthalpy of formation ( ${\text{ΔH}}_{\text{f}}\text{º}$) of ClO should be determined.

Concept Introduction:

• Standard enthalpy of formation: of a compound ( ${\text{ΔH}}_{\text{f}}\text{º}$) is equal to its enthalpy change ( $\text{ΔH}$) when one mole of compound is formed at 25°C and 1 atm from elements in their stable form.

$\text{ΔHº}\text{=}\text{Σ}\text{BE}\text{(reactants)}\text{-}\text{Σ}\text{BE(products)}$

The BE indicates the bond energy.

• Bond energy: It is the amount of energy required to pull two bonded atoms apart which is the same as the amount of energy released when two atoms are brought together into a bond.
• To determine: standard enthalpy of formation of reaction.