In Carnot's cycle, the process immediately followed by isothermal expansion is
A
Isothermal compresion
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B
Adiabatic compression
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C
Adiabatic expansion
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D
Free expansion
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Solution
The correct option is C Adiabatic expansion In a Carnot's cycle, isothermal expansion is followed by adiabatic expansion. During the process of adiabatic expansion the system is thermally insulated.
The gas continues to expand and does work on surrounding at the expense of its internal energy which causes a reduction in temperature of system.