   Chapter 8, Problem 55PS

Chapter
Section
Textbook Problem

The compound oxygen difluoride is quite reactive, giving oxygen and HF when treated with water:OF2(g) + H2O(g) → O2(g) + 2 HF(g) Δ r H ∘ = ‒318 kl/mol-rxnUsing bond dissociation enthalpies, calculate the bond dissociation enthalpy of the O—F bond in OF2.

Interpretation Introduction

Interpretation: It should be determined for the bond dissociation enthalpy of the O-F bond in OF2.

Concept Introduction:

Bond dissociation enthalpy:

Bond energy or more correctly the bond dissociation enthalpy is the enthalpy change when breaking a bond in a molecule with the reactant and products in the gas phase.

Hydrogenation reaction:

Addition of hydrogen to a molecule is known as hydrogenation reaction.

Explanation

The compound oxygen difluoride is quite reactive by giving oxygen and HF when treated with Water:

OF2(g)+H2O(g)O2(g)+2HF(g)ΔrH0=-318KJ/mol-rxn

Using the bond dissociation enthalpy in table (8.8), we can estimate the enthalpy change for this given compound (O-F) bond in OF2.

Examining the reaction shows that there are 2 O-F bonds 2 O-H bonds in reactant side and one O-O and 2 H-F in product side

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