Q7 of 27 Page 85

Which of the processes described below are irreversible?

We know that in thermodynamics, a reversible process is a

process whose direction can be reversed by including


infinitesimal changes to the property of the system through


its surroundings.


Now,


case(a) in which internal energy of the rod is increased


through external work done, this process is irreversible.


case(b) heat is transferred from one container to


another, process is irreversible.


case (c) process is reversible because cylinder is fitted with


frictionless piston.
case(d) process is irreversible as weight is added to the


cylinder arrangement in form of external pressure.


option (a, b, d) is correct.

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