Two blocks with different temperatures had entropies of 10 J/K and 30 J/K before they were brought in contact. What can you say about the entropy of the combined system after the two came in contact with each other? a. Ssystem > 40 J/Kb. Ssystem = 20 J/K c. Ssystem 20 J/Ke. Ssystem = 40 J/Kf. Ssystem < 40 J/K

Question

Physics

Megan Gill

18 August, 10:25

Two blocks with different temperatures had entropies of 10 J/K and 30 J/K before they were brought in contact. What can you say about the entropy of the combined system after the two came in contact with each other? a. Ssystem > 40 J/Kb. Ssystem = 20 J/K c. Ssystem 20 J/Ke. Ssystem = 40 J/Kf. Ssystem < 40 J/K

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Answers (1)

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Murray · Answer 1

a. Ssystem > 40 J/K

Explanation:

Given that

The entropy of first block = 10 J/K

The entropy of second block = 30 J/K

When two bodies come into contact with each other, the entropy of the combined system will increase and the entropy sum remains unchanged: According to the Second law of thermodynamics. The entropy of the system will be greater than 40 J/K.

Therefore the answer is a.

Ssystem > 40 J/K