If the engine is supposed to work between 727°C and 227°C, then the maximum possible efficiency is:
Correct answer: A. 1/2
- A. 1/2
- B. 1/4
- C. 3/4
- D. 1
Explanation
T1 = 727 + 273 = 1000 K T2 = 227 + 273 = 500 K Efficiency of engine = 1 - (T2/T1) = 1 - (500/1000) = 1 - ½ = ½ Hence, option A is the correct option.
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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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