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Question
Define heat engine.
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Solution
Heat engine is a device which takes heat as input and converts this heat into work by undergoing a cyclic process.
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Answer in brief.
What sets the limits on the efficiency of a heat engine?
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.
What are the processes involves in a Carnot engine?
Explain the heat engine and obtain its 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?
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 ______.
Draw a neat labelled P - V diagram for a typical heat engine.
What does a heat engine consist of?
