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Use bond energies (table 3-3), values of electron affinities (table 2-7), and the ionization energy of hydrogen (1312 kJ/mol) to estimate ∆E for each of the following reactions. a. HF( g ) → H + ( g ) + F − (g) b. HCl( g ) → H+( g ) + Cl − (g) c. HI( g ) → H+( g ) + I − ( g ) d. H 2 O( g ) → H + ( g ) + OH − ( g ) (Electron affinity of OH( g ) = −180. kJ/mol.)

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Chemistry: An Atoms First Approach

2nd Edition
Steven S. Zumdahl + 1 other
Publisher: Cengage Learning
ISBN: 9781305079243

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BuyFindarrow_forward

Chemistry: An Atoms First Approach

2nd Edition
Steven S. Zumdahl + 1 other
Publisher: Cengage Learning
ISBN: 9781305079243
Chapter 3, Problem 125AE
Textbook Problem
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Use bond energies (table 3-3), values of electron affinities (table 2-7), and the ionization energy of hydrogen (1312 kJ/mol) to estimate ∆E for each of the following reactions.

a. HF(g) → H+(g) + F(g)

b. HCl(g) → H+(g) + Cl(g)

c. HI(g) → H+(g)+ I(g)

d. H2O(g) → H+(g) + OH(g)

(Electron affinity of OH(g) = −180. kJ/mol.)

(a)

Interpretation Introduction

Interpretation: Using the given values of bond energy, the electron affinity and the ionization energy of hydrogen to be calculated for the given reactions.

Concept introduction: The change in energy for a given chemical equation is the sum of the bond energy, the ionization energy and the electron affinity values of the respective steps involved in the chemical reaction.

To determine: The change in energy for the given reaction, HF(g)H+(g)+F(g) .

Explanation of Solution

Explanation:

The chemical reaction involved is,

HF(g)H+(g)+F(g)

The various steps included in the total process are,

HF(g)H(g)+F(g) , bond energy =565kJmol1

H(g)H+(g)+e , ionization energy =1312kJmol1

F(g)+eF(g) , electron affinity =327

(b)

Interpretation Introduction

Interpretation: Using the given values of bond energy, the electron affinity and the ionization energy of hydrogen to be calculated for the given reactions.

Concept introduction: The change in energy for a given chemical equation is the sum of the bond energy, the ionization energy and the electron affinity values of the respective steps involved in the chemical reaction.

To determine: The change in energy for the given reaction, HCl(g)H+(g)+Cl(g) .

(c)

Interpretation Introduction

Interpretation: Using the given values of bond energy, the electron affinity and the ionization energy of hydrogen to be calculated for the given reactions.

Concept introduction: The change in energy for a given chemical equation is the sum of the bond energy, the ionization energy and the electron affinity values of the respective steps involved in the chemical reaction.

To determine: The change in energy for the given reaction, HI(g)H+(g)+I(g) .

(d)

Interpretation Introduction

Interpretation: Using the given values of bond energy, the electron affinity and the ionization energy of hydrogen to be calculated for the given reactions.

Concept introduction: The change in energy for a given chemical equation is the sum of the bond energy, the ionization energy and the electron affinity values of the respective steps involved in the chemical reaction.

To determine: The change in energy for the given reaction, H2O(g)H+(g)+OH(g) .

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Chapter 3 Solutions

Chemistry: An Atoms First Approach
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