Student Solutions Manual for Ball's Physical Chemistry, 2nd
Student Solutions Manual for Ball's Physical Chemistry, 2nd
2nd Edition
ISBN: 9798214169019
Author: David W. Ball
Publisher: Cengage Learning US
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Chapter 18, Problem 18.1E
Interpretation Introduction

(a)

Interpretation:

The value of qnuc for 12C atoms is to be determined.

Concept introduction:

Different linearly independent wavefunctions that have same energy are called degenerate. This is expressed in terms of degeneracy. If two functions are having same energy then they are called doubly degenerate and so on. The degeneracy for nuclear state is given as,

g1=2I+1

Where,

I represents the nuclear spin.

Expert Solution
Check Mark

Answer to Problem 18.1E

The value of qnuc for 12C atoms is 1.

Explanation of Solution

From Appendix 5,

The nuclear spin of 12C atoms is 0.

The degeneracy for nuclear state is given as,

g1=2I+1 …(1)

Where,

I represents the nuclear spin.

Substitute the value of I in the equation (1).

g1=2(0)+1=1

The partition function for nucleus is given as,

qnuc=g1 …(2)

Substitute the value of g1 in the equation (2).

qnuc=1

Therefore, the value of qnuc for 12C atoms is 1.

Conclusion

The value of qnuc for 12C atoms is 1.

Interpretation Introduction

(b)

Interpretation:

The value of qnuc for 56Fe atoms is to be determined.

Concept introduction:

Different linearly independent wavefunctions that have same energy are called degenerate. This is expressed in terms of degeneracy. If two functions are having same energy then they are called doubly degenerate and so on. The degeneracy for nuclear state is given as,

g1=2I+1

Where,

I represents the nuclear spin.

Expert Solution
Check Mark

Answer to Problem 18.1E

The value of qnuc for 56Fe atoms is 1.

Explanation of Solution

From Appendix 5,

The nuclear spin of 56Fe atoms is 0.

The degeneracy for nuclear state is given as,

g1=2I+1 …(1)

Where,

I represents the nuclear spin.

Substitute the value of I in the equation (1).

g1=2(0)+1=1

The partition function for nucleus is given as,

qnuc=g1 …(2)

Substitute the value of g1 in the equation (2).

qnuc=1

Therefore, the value of qnuc for 56Fe atoms is 1.

Conclusion

The value of qnuc for 56Fe atoms is 1.

Interpretation Introduction

(c)

Interpretation:

The value of qnuc for 1H atoms is to be determined. The corresponding answer is to be explained.

Concept introduction:

Different linearly independent wavefunctions that have same energy are called degenerate. This is expressed in terms of degeneracy. If two functions are having same energy then they are called doubly degenerate and so on. The degeneracy for nuclear state is given as,

g1=2I+1

Where,

I represents the nuclear spin.

Expert Solution
Check Mark

Answer to Problem 18.1E

The value of qnuc for 1H atoms is 2.The nuclear degeneracy of 1H is due to the presence of only one proton.

Explanation of Solution

From Appendix 5,

The nuclear spin of 1H atoms is 12.

The degeneracy for nuclear state is given as,

g1=2I+1 …(1)

Where,

I represents the nuclear spin.

Substitute the value of I in the equation (1).

g1=2(12)+1=2

The partition function for nucleus is given as,

qnuc=g1 …(2)

Substitute the value of g1 in the equation (2).

qnuc=2

Therefore, the value of qnuc for 1H atoms is 2.

Hydrogen is the only atom that has no neutrons in its nucleus. Therefore, the nuclear degeneracy of 1H is due to the presence of only one proton.

Conclusion

The value of qnuc for 1H atoms is 2. The nuclear degeneracy of 1H is due to the presence of only one proton.

Interpretation Introduction

(d)

Interpretation:

The value of qnuc for D atoms is to be determined. The corresponding answer is to be explained.

Concept introduction:

Different linearly independent wavefunctions that have same energy are called degenerate. This is expressed in terms of degeneracy. If two functions are having same energy then they are called doubly degenerate and so on. The degeneracy for nuclear state is given as,

g1=2I+1

Where,

I represents the nuclear spin.

Expert Solution
Check Mark

Answer to Problem 18.1E

The value of qnuc for D atoms is 3. The nuclear degeneracy of deuterium atom is due to the presence of a proton and a neutron.

Explanation of Solution

From Appendix 5,

The nuclear spin of D atoms is 1.

The degeneracy for nuclear state is given as,

g1=2I+1 …(1)

Where,

I represents the nuclear spin.

Substitute the value of I in the equation (1).

g1=2(1)+1=3

The partition function for nucleus is given as,

qnuc=g1 …(2)

Substitute the value of g1 in the equation (2).

qnuc=3

Therefore, the value of qnuc for D atoms is 3.

A deuterium atom contains one proton and one neutron. The spin of proton and neutron does not cancel each other but combines with each other. Therefore, the nuclear degeneracy of deuterium atom is due to the presence of a proton and a neutron.

Conclusion

The value of qnuc for D atoms is 3. The nuclear degeneracy of deuterium atom is due to the presence of a proton and a neutron.

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Chapter 18 Solutions

Student Solutions Manual for Ball's Physical Chemistry, 2nd

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