1. Suppose we have two identical boxes of matter, A and B, that are in thermal c

Question

1. Suppose we have two identical boxes of matter, A and B, that are in thermal contact but cannot exchange materials. They come to thermal equilibrium. System 1 consists of box A alone, while system 2 consists of both boxes A and B. What can you say about the entropy of the two systems? Could potentially have multiple answers

2. Two rooms of a cabin are kept at different temperatures, as shown. If 5 J of energy pass through the interior wall from room 2 to room 1, the exchange is too small to change the temperature of either room by a measurable amount. S1 and S2 are the entropies of the two rooms. If only this exchange occurs:

Briefly explain your reasoning

2. Two rooms of a cabin are kept at different temperatures, as shown. If 5 J of energy pass through the interior wall from room 2 to room 1, the exchange is too small to change the temperature of either room by a measurable amount. S1 and S2 are the entropies of the two rooms. If only this exchange occurs:

3. Suppose a small amount of heat Q flows from a system A at high temperature (350K) to a system B at low temperature (250K). If Q = 0.5 J, mA = 1.2 kg, and mB = 0.6 kg, what will the total entropy change of the system be as a result? _____ J/K

Briefly explain your reasoning

System 1 System 2 A B

Explanation / Answer

(Q1)

(Q2)

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