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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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Section
BuyFindarrow_forward

Chemistry: An Atoms First Approach

2nd Edition
Steven S. Zumdahl + 1 other
Publisher: Cengage Learning
ISBN: 9781305079243
Chapter 10, Problem 39E
Textbook Problem
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The lattice energy* of NaI is −686 kJ/mol, and the enthalpy of hydration is −694 kJ/mol Calculate the enthalpy of solution per mole of solid NaI. Describe the process to which this enthalpy change applies.

Interpretation Introduction

Interpretation:

The enthalpy of the solution per mole of solid Sodium Iodide to be calculated and the process to which this enthalpy change applies to be described.

Concept introduction

Hess’s law:  Hess's law states that the change of enthalpy in a chemical reaction (i.e. the heat of reaction at constant pressure) is independent of the pathway between the initial and final states.

ΔH0=ΔH0f (product)ΔH0f (reactant)

Explanation of Solution

By using Hess’s law the enthalpy change can be determined.

NaI(s)Na+(g)+I-(g)ΔH=-ΔHLE= -(-686kJ/mol)Na+(g)+I-(g)Na+(aq)+I-</

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Chapter 10 Solutions

Chemistry: An Atoms First Approach
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Ch. 10 - Consider Fig. 10-9. According to the caption and...Ch. 10 - Once again, consider Fig. 10-9. 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