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Homework Help: Curie's Law and 3rd Law of Thermodynamics

  1. Jul 7, 2015 #1


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    1. The problem statement, all variables and given/known data
    "According to 3rd Principle of Thermodynamics, prove whether or not paramagnetic substances obey Curie's Law at temperatures close to 0K"

    2. Relevant equations
    Curie's Law: M=CH/T

    3. The attempt at a solution
    I've done some research and I found this link (on page 245): www.nobelprize.org/nobel_prizes/chemistry/laureates/1949/giauque-lecture.pdf
    It says that Curie's Law fails at temperatures close to 0K, but I don't know why. Is it because M goes to infinite?
    Thank you
  2. jcsd
  3. Jul 8, 2015 #2
    If M = CH/T what does this predict as you lower the temp? What does H due to the magnetization. Physically what does the magnetic field do to the atoms? Is there a limit to the value of M? What happens at 0 deg K? ( Think no excited states.) How does this compare to what Curies Law states?
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