EBK ELEMENTARY PRINCIPLES OF CHEMICAL P
EBK ELEMENTARY PRINCIPLES OF CHEMICAL P
4th Edition
ISBN: 9781119192107
Author: BULLARD
Publisher: JOHN WILEY+SONS,INC.-CONSIGNMENT
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Chapter 3, Problem 3.42P
Interpretation Introduction

(a)

Interpretation:

The fraction of 137Cs that have to decay for the level of cesium-related radioactivity of the contents, total mass of cesium (kg) represented by loss and year at which the level will be reached should be calculated.

Concept introduction:

The radioactive decay can be calculated as follows:

N=N012t/t1/2

Here, N is amount of subtance remain after time t, No is initial amount of substance, t is time and t1/2 is half life time.

The specific radioactivity per liter SrL can be calculated as follows:

SrL=Srρ

Here, Sr is specfic radioacivity and ρ is concemtration.

Interpretation Introduction

(b)

Interpretation:

The concentration of 137Cs in the tank (g/L) should be calculated when the waste was first stored.

Concept introduction:

The radioactive decay can be calculated as follows:

N=N012t/t1/2

Here, N is amount of subtance remain after time t, No is initial amount of substance, t is time and t1/2 is half life time.

The specific radioactivity per liter SrL can be calculated as follows:

SrL=Srρ

Here, Sr is specfic radioacivity and ρ is concemtration.

Interpretation Introduction

(c)

Interpretation:

The reason for the radioactive cesium in the tank to poses a signifiicant environmental threat but not by the radioactive barium should be explained.

Concept introduction:

All the radioactive substance are harmfull for environment. The extent of harm they can cause to environment depends on their decay rate that depends on their half life time. More the decay rate or lower the half life time, less the substance is harmful to environment. Therefore, a substance with higher half life time will have low decay rate and it will be more harmful to the environment.

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Chapter 3 Solutions

EBK ELEMENTARY PRINCIPLES OF CHEMICAL P

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