Question:
Which one of the following entropy (S) - temperature (T) diagrams CORRECTLY represents the Carnot cycle abcda shown in the P-V diagram?
Which one of the following entropy (S) - temperature (T) diagrams CORRECTLY represents the Carnot cycle abcda shown in the P-V diagram?
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For a Carnot cycle, isothermal processes are straight horizontal lines in the entropy-temperature diagram, while adiabatic processes are curved.
Updated On: Aug 30, 2025
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The Correct Option is D
Solution and Explanation
- In the Carnot cycle, the entropy (S) - temperature (T) diagram involves two isothermal processes and two adiabatic processes.
- The isothermal processes occur at constant temperature (i.e., straight lines in the S-T diagram).
- The adiabatic processes, on the other hand, involve changes in both temperature and entropy. These are typically represented as curved lines in the S-T diagram.
- Option (D) correctly represents these features with isothermal lines at constant temperatures and adiabatic processes as curved lines.
Thus, the correct answer is (D).
- The isothermal processes occur at constant temperature (i.e., straight lines in the S-T diagram).
- The adiabatic processes, on the other hand, involve changes in both temperature and entropy. These are typically represented as curved lines in the S-T diagram.
- Option (D) correctly represents these features with isothermal lines at constant temperatures and adiabatic processes as curved lines.
Thus, the correct answer is (D).
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