MHT CET Medical202625 April 2026Evening ShiftPhysicsThermodynamicsActual
Identify the INCORRECT statement for isobaric process.
Options
- Ap = 0
- BW 0
- CQ 0
- DU = 0
Correct answer
D. U = 0
Step-by-step solution
In an isobaric process, the pressure of the system remains constant, so p = 0 . The work done is given by W = p V . Since the volume changes, W 0 . The heat exchanged is Q = nC_p T . Since the temperature changes, Q 0 . The change in internal energy is U = nC_v T . Since the temperature changes, U 0 . The statement U = 0 is true for an isothermal process of an ideal gas, not an isobaric process. Therefore, U = 0 is the incorrect statement. Answer: U = 0