Question

Which of the following processes described below is irreversible?

• A. The increase in temperature of an iron rod by hammering it.
• B. A gas in a small container at a temperature T1 is brought in contact with a big reservoir at a higher temperature T2 which increases the temperature of the gas.
• C. An ideal gas is enclosed in a piston cylinder arrangement with adiabatic walls.
• D. All of above

Answer 1

Answer: (D)

All of above

Answer 2

The process described in (1), (2) and (3) all are irreversible