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14. Reviewing Sample Problem 32-1 before doing this exercise is helpful. Let

=

3

2

kT =



µ· 

B

− (−µ· 

B)



 = 2µB

which leads to

=

4µB

3k

=

4(1.0

× 10

23

J/T)(0.50 T)

3(1.38

× 10

23

J/K)

= 0.48 K .


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