Question

Which of the process is not the irreversible process?

• A. The free expansion of gas
• B. When a vessel is heated its base is warmer than other parts
• C. The quasi-static isothermal expansion of ideal gas in cylinder fitted with frictionless piston
• D. Diffusion of gas from cylinder

Answer 1

Answer: (C)

The quasi-static isothermal expansion of ideal gas in cylinder fitted with frictionless piston

In thermodynamics, a quasi-static process is a thermodynamic process that happens slowly enough for the system to remain in internal equilibrium. An example of this is quasi-static compression, where the volume of a system changes at a rate slow enough to allow the pressure to remain uniform and constant throughout the system.

Hence the quasi-static isothermal expansion of ideal gas in cylinder fitted with frictionless piston is reversible process