Question

Given S-T (entropy vs temperature) diagram is of reversible cyclic process. Which of the following statements is/are correct?

• A. Work done by the system in the whole cycle is 60 KJ
• B. Input heat to the system by any process is 90 KJ
  
• C. Heat given out by the system in process BC is 120 KJ
  
• D. Work done by the system in process CD is -30 KJ

Answer 1

Answer: (A), (B), (D)

The correct options are
A Work done by the system in the whole cycle is 60 KJ
B Input heat to the system by any process is 90 KJ

D Work done by the system in process CD is -30 KJ

Cycle is Carnot cycle

AB is isothermal expansion in which 90 KJ heat is given to the system BC is adiabatic expansion CD is isothermal compression in which heat given out is 30 KJ DA is adiabatic compression.