The entropy of a system increases when:
Correct answer: C. Heat is added at constant temperature
- A. Heat is removed from the system
- B. Work is done on the system
- C. Heat is added at constant temperature
- D. Temperature decreases
Explanation
Entropy change is ΔS = Q/T for a reversible process at constant temperature. Adding heat (Q > 0) increases entropy, as it increases the system's disorder.
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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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