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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 18, Problem 70AE
Textbook Problem
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Consider the following reaction, which can take place in particle accelerators:

H 1 1 + n 0 1 2 H 1 1 + n 0 1 + H 1 1

Calculate the energy change for this reaction. Is energy released or absorbed? What is a possible source for this energy?

Interpretation Introduction

Interpretation: A reaction taking place in particle accelerators is given.  The energy change for the reaction is to be calculated. Whether the energy is released or absorbed and the possible source for this energy is to be identified.

Concept introduction: In a nuclear fission, two light nuclei combined to form heavier nuclei. In a nuclear reactor, a self-sustained fission chain reaction occurs and energy is released during the process.

To determine: The change in energy for the given reaction; whether the energy is released or absorbed and the source of energy.

Explanation of Solution

Explanation

The mass of electron is 9.10938×1031kg .

The mass of proton is 9.10938×1031kg .

The equation for which mass defect is to be calculated is,

11H+01n211H+01n+11H

The change in mass is calculated by the formula,

Δm=MassofproductsMassofreactants

Where,

  • Δm is the change in mass.

Substitute the values of mass of proton, mass of electron in the above formula.

Δm=MassofproductsMassofreactants=(2mp+mn+me)(mp+mn)=mp+me=(1.672621×1027)+(9.10938×1031)=1.6735×10-27kg_

The change in mass is 1

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Chapter 18 Solutions

Chemistry: An Atoms First Approach
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