Section: Thermodynamics | Marks: 1
Gas in a cylinder-piston device expands from state 1 1 1 1 ( , , ) p V T to state 2 2 2 2 ( , , ). p V T The expansion process is polytropic, i.e., constant, 1 n pV n = ≠. Assuming the ideal gas behaviour, the expression for the work done, W by the system is given by
- A. 2 1 1 1 ln T W pV T =
- B. 2 2 1 1 1 p V pV W n − = −
- C. 1 1 1 2 ln V W pV V =
- D. 2 2 2 1 ln p W p V p =
Answer: B. 2 2 1 1 1 p V pV W n − = −