2000E1 - Questions from Exam 1 Fall 2000 3.20 MIT Professor...

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± ² = = ±V T ∂T ∂H S A K. K. MH lV Kln Questions from Exam 1 Fall 2000 3.20 MIT Professor Gerbrand Ceder Question 1 (starter) Question 2 (a bit more challenging) Question 3 (go for it thermo wizzes) Answer part c only if you cannot do part a. If you solve this part no credit will be given for part a. A 100 ohm resistor is held at a constant temperature of 300 A current of 10 Amperes is passed through the resistor for 300 seconds. The electrical current is supplied by a reversible electrochemical cell (battery). (a) What is the change in entropy of the resistor assuming it remains at 300 (b) What is the change in entropy of the universe (universe = system + surroundings, including the battery). (c) What is the internal energy change of the universe? a) Describe accurately the concept of adiabatic demagnetization. Use equations or pictures if needed. b) For a paramagnetic material that obeys the Curie Law, , express in terms of the Curie constant, the heat capacity under constant field and other fundamental properties of the material.
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This note was uploaded on 05/04/2010 for the course CHEM 24597889 taught by Professor Karl during the Spring '10 term at York County CC.

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2000E1 - Questions from Exam 1 Fall 2000 3.20 MIT Professor...

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