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Question: Answered & Verified by Expert
A system undergoes a reversible adiabatic process. The entropy of the system
PhysicsThermodynamicsJEE Main
Options:
  • A Remains constant
  • B May increase or may decrease
  • C Increases
  • D Decreases
Solution:
1318 Upvotes Verified Answer
The correct answer is: Remains constant
In general, the temperature of the system may change during a process. If the process is reversible, the change in entropy is defined as

Sf-Si=ifQT

In an adiabatic reversible process, no heat is given to the system. Therefore, entropy of the system remains constant. 

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