Question

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/Kd.Ssystem > 20 J/Ke.Ssystem = 40 J/Kf.Ssystem < 40 J/K

Answer 1

Answer:

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