Chapter 22, Problem 90IAE

Interpretation Introduction

(a)

Interpretation:

The value of ${\text{Δ}}_{\text{r}}{\text{H}}^{\text{o}}$ at 298 K for ClF(g) with the help of given bond energy values should be determined.

Concept introduction:

The standard enthalpy of formation can be defined as the energy change during the formation of one mole of substance from its constituent elements in their standard state. It is denoted as $\Delta {\text{H}}_{\text{f}}^{°}$ and can be calculated with the help of bond energy values of reactant and products. The relation between $\Delta {\text{H}}_{\text{f}}^{°}$ and bond energy values can be shown as:

${\text{ΔH}}_{\text{rxn}}{\text{=ΣBE}}_{\text{reactants}}{\text{-ΣBE}}_{\text{products}}$

Interpretation Introduction

(b)

Interpretation:

The value of ${\text{Δ}}_{\text{r}}{\text{H}}^{\text{o}}$ at 298 K for OF₂(g) with the help of given bond energy values should be determined.

Concept introduction:

The standard enthalpy of formation can be defined as the energy change during the formation of one mole of substance from its constituent elements in their standard state. It is denoted as $\Delta {\text{H}}_{\text{f}}^{°}$ and can be calculated with the help of bond energy values of reactant and products. The relation between $\Delta {\text{H}}_{\text{f}}^{°}$ and bond energy values can be shown as:

${\text{ΔH}}_{\text{rxn}}{\text{=ΣBE}}_{\text{reactants}}{\text{-ΣBE}}_{\text{products}}$

Interpretation Introduction

(c)

Interpretation:

The value of ${\text{Δ}}_{\text{r}}{\text{H}}^{\text{o}}$ at 298 K for Cl₂O(g) with the help of given bond energy values should be determined.

Concept introduction:

The standard enthalpy of formation can be defined as the energy change during the formation of one mole of substance from its constituent elements in their standard state. It is denoted as $\Delta {\text{H}}_{\text{f}}^{°}$ and can be calculated with the help of bond energy values of reactant and products. The relation between $\Delta {\text{H}}_{\text{f}}^{°}$ and bond energy values can be shown as:

${\text{ΔH}}_{\text{rxn}}{\text{=ΣBE}}_{\text{reactants}}{\text{-ΣBE}}_{\text{products}}$

Interpretation Introduction

(d)

Interpretation:

The value of ${\text{Δ}}_{\text{r}}{\text{H}}^{\text{o}}$ at 298 K for NF₃(g) with the help of given bond energy values should be determined.

Concept introduction:

The standard enthalpy of formation can be defined as the energy change during the formation of one mole of substance from its constituent elements in their standard state. It is denoted as $\Delta {\text{H}}_{\text{f}}^{°}$ and can be calculated with the help of bond energy values of reactant and products. The relation between $\Delta {\text{H}}_{\text{f}}^{°}$ and bond energy values can be shown as:

${\text{ΔH}}_{\text{rxn}}{\text{=ΣBE}}_{\text{reactants}}{\text{-ΣBE}}_{\text{products}}$