The entropy change of the universe for a reversible process is:
Correct answer: C. Zero
- A. Positive
- B. Negative
- C. Zero
- D. Infinite
Explanation
For a reversible process, the total entropy change of the universe (system + surroundings) is zero, as entropy gained by the system is balanced by entropy lost by surroundings.
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About Thermal Equilibrium and Heat
Thermal equilibrium means that bodies in contact have the same temperature and no net heat flows between them. The topic distinguishes heat from temperature, uses the zeroth law of thermodynamics, and covers heat transfer, specific heat capacity, thermal expansion and the conditions for reaching equilibrium.
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