Which of the processes described below are irreversible a

Last updated: 6/12/2023

Which of the processes described below are irreversible a The increase in temprature of an iron rod by hammering it b A gas in a small cantainer at a temprature T is brought in which contact with a big reservoir at a higher temprature T increases the temprature of the gas c A quasi static isothermal expansion of an ideal gas in cylinder fitted with a frictionless piston