Which of the processes described below areirreversible ? a) The increase in temprature of an iron rodby hammering it b) A gas in a small cantainer at a tempratureT_(1)is brought in contact with a big reservoir at a higher temprature T_(2)which increasesthe temprature of the gas c) A quasi-static isothermal expansion of anideal gas in cylinder fitted with a frictionlesspiston d) An ideal gas is enclosed in a piston cylinderarrangement with adiabatic walls. A weight W is added to the piston, resulting incompression of gas

Which of the processes described below areirreversible ? a) The increa

1.	Which of the processes described below areirreversible ? a) The increase in temprature of an iron rodby hammering it b) A gas in a small cantainer at a tempratureT_(1)is brought in contact with a big reservoir at a higher temprature T_(2)which increasesthe temprature of the gas c) A quasi-static isothermal expansion of anideal gas in cylinder fitted with a frictionlesspiston d) An ideal gas is enclosed in a piston cylinderarrangement with adiabatic walls. A weight W is added to the piston, resulting incompression of gas
Answer» only a, B are correct only b, d are correct only C, d are correct a,b,d are correct Answer :D