KCET2026PhysicsThermodynamics
In thermodynamic processes, which of the following statements is not true?
Options
- AIn an isothermal process, the temperature remains constant
- BIn an isobaric process, the volume remains constant
- CIn an adiabatic process, the system is insulated from the surroundings
- DIn an adiabatic process, PV^ = a constant
Correct answer
B. In an isobaric process, the volume remains constant
Step-by-step solution
In an isothermal process, the temperature of the system remains constant. In an isobaric process, the pressure of the system remains constant, not the volume. A process in which the volume remains constant is called an isochoric process. In an adiabatic process, there is no heat exchange between the system and the surroundings ( dQ = 0 ), which means the system is thermally insulated. For an ideal gas undergoing a reversible adiabatic process, the relation PV^ = constant holds true. Therefore, the statement regardi