Two bodies A and B of temperatures TA = 100°C and TB = 0°C, are brought into thermal contact with each other. Which one of the following is possible at thermal equilibrium?
Correct answer: C. TA = 45°C, TB = 45°C
- A. TA = 0°C, TB = 100°C
- B. TA = 60°C, TB = 50°C
- C. TA = 45°C, TB = 45°C
- D. TA = 60°C, TB = 40°C
Explanation
Thermal equilibrium occurs when two bodies are in contact with each other and can freely exchange energy. Systems are in thermal equilibrium when they have the same temperature.Diagram:
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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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