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प्रश्न
State the second law of thermodynamics in terms of entropy.
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उत्तर
“For all the processes that occur in nature (irreversible process), the entropy always increases. For reversible process entropy will not change”. Entropy determines the direction in which natural processes should occur.
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संबंधित प्रश्न
Answer in brief:
A gas contained in a cylinder surrounded by a thick layer of insulating material is quickly compressed has work been done?
The efficiency of a heat engine working between the freezing point and boiling point of water is ____________.
State Clausius form of the second law of thermodynamics.
State Kelvin-Planck's statement of the second law of thermodynamics.
Explain in detail the Carnot heat engine.
Derive the expression for Carnot engine efficiency.
Suppose a person wants to increase the efficiency of the reversible heat engine that is operating between 100°C and 300°C. He had two ways to increase efficiency.
- By decreasing the cold reservoir temperature from 100°C to 50°C and keeping the hot reservoir temperature constant
- by increasing the temperature of the hot reservoir from 300°C to 350°C by keeping the cold reservoir temperature constant.
Which is the suitable method?
A Carnot engine whose efficiency is 45% takes heat from a source maintained at a temperature of 327°C. To have an engine of efficiency of 60% what must be the intake temperature for the same exhaust (sink) temperature?
Draw a neat labelled P - V diagram for a typical heat engine.
What does a heat engine consist of?
