PHYSICS H7B Midterm: physicsH7B-fa2015-mt1-Winoto-exam
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There are 4 problems total (not in any order of length and difficulty, they vary, but all of them are worth the same), do them in any order you prefer. Total points for the exam = 100 points for a perfect score. You have exactly 125 minutes to complete the test. Please outline and explain in details all your physical and mathematical reasonings in a clear, concise, step-by-step and logical manner: (25 points): carnot engine: An infinite heat reservoir m1 is at a constant temperature th. A finite system or reservoir m2 with a constant heat capacity c2, is initially at temperatures t2. Suppose we bring m2 into thermal contact with m1. Please calculate the entropy change of m2, the entropy change of m1, and the total entropy change. (only if you have time, show explicitly that the total entropy change is strictly greater than zero).
