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The Principles of Thermodynamics
book

The Principles of Thermodynamics

by N.D. Hari Dass
October 2013
Intermediate to advanced content levelIntermediate to advanced
352 pages
13h 56m
English
CRC Press
Content preview from The Principles of Thermodynamics
Magnetic Systems 159
susceptibility
χ
S
. We could have introduced the magnetic analog of the coefcient of
thermal expansion as
α
M
=
1
V
M
T
B
e
. But we shall not do so to avoid a prolifera-
tion of symbols; instead we shall explicitly display the temperature derivative of M .
However, it is useful to eliminate
B
e
T
M
in terms of quantities already introduced.
B
e
T
M
=
M
T
B
e
B
e
M
T
=
1
V
χ
T
M
T
B
e
(8.23)
This allows us to simplify the magnetic TdS equations further:
TdS = C
M
dT +
T
V
χ
T
M
T
B
e
dM
TdS = C
B
e
dT + T
M
T
B
e
dB
e
(8.24)
Equating the two TdS equations one gets
0=(C
M
C
B
e
)dT + T
M
T
B
e
1
V
χ
T
dM dB
e
(8.25)
As in our discussion for the nonmagnetic case, ...
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Publisher Resources

ISBN: 9781466512085