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प्रश्न
Why does heat flow from a hot object to a cold object?
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उत्तर
Because entropy increases when heat flows from a hot object to a cold object. If heat were to flow from a cold to a hot object, entropy will decrease leading to violation of second law thermodynamics.
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संबंधित प्रश्न
Answer in brief.
What sets the limits on the efficiency of a heat engine?
State Clausius form of the second law of thermodynamics.
State Kelvin-Planck's statement of the second law of thermodynamics.
State the second law of thermodynamics in terms of entropy.
Explain the heat engine and obtain its efficiency.
Explain the second law of thermodynamics in terms of entropy.
For a heat engine operating between temperatures t1 °C and t2 °C, its efficiency will be ______.
Let η1 is the efficiency of an engine at T1 = 447°C and T2 = 147°C while η2, is the efficiency at T1 = 947°C and T2 = 47°C. The ratio `eta_1/eta_2` will be ______.
What does a heat engine consist of?
Mention any two elements of a heat engine.
