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The Carnot Cycle
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Isentropic Expansion
An adiabatic process where the gas expands, doing work on the surroundings, and the entropy remains constant.
Isothermal Expansion
A process in which the gas expands slowly in thermal contact with a heat reservoir at constant temperature, doing work and absorbing heat.
Isentropic Compression
An adiabatic process where the gas is compressed, reducing volume without exchange of heat, and the entropy remains constant.
Isothermal Compression
A process during which the gas is compressed at a constant temperature and releases heat to the cold reservoir.
Heat Absorption
During the isothermal expansion phase, the system absorbs a specific amount of heat from the hot reservoir.
Heat Rejection
During the isothermal compression phase, the system rejects a specific amount of heat to the cold reservoir.
Efficiency of Carnot Engine
The efficiency is the ratio of the work done by the engine to the heat absorbed from the hot reservoir, given by the equation .
Reversibility
A characteristic of Carnot cycles where all processes can be reversed, with the system returning to its initial state without any net change in the external environment.
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