Problem 2. (total: 25 points) Thermal interaction of two spin 42 system. Consider two spin systems A and A' placed in an

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Problem 2 Total 25 Points Thermal Interaction Of Two Spin 42 System Consider Two Spin Systems A And A Placed In An 1 (127.78 KiB) Viewed 63 times

Problem 2. (total: 25 points) Thermal interaction of two spin 42 system. Consider two spin systems A and A' placed in an external field H. System A consists of N weakly interacting localized particles of spin 12 and magnetic moment u. Similarly, system A' consists of N' weakly interacting localized particles of spin 12 and magnetic moment u'. The two systems are initially isolated with respective total energies bNuH and b'N'u'H. They are then placed in thermal contact with each other. (a) (10 points) In the most probable situation corresponding to the final thermal equilibrium, how is the energy Ē of system A related to the energy Ē' of system A'? (b) (10 points) What is the value of the energy Ē of system A? (c) (5 points) What is the heat Q absorbed by system A in going from the initial situation to the final situation when it is in equilibrium with A'?