In thermodynamics does heat transfer and work transfer alway

In thermodynamics, does heat transfer and work transfer always accompany entropy transfer? explain with detail please.

Solution

Transferring heat into or out of a system changes the entropy of the system. But that\'s not the only way a system\'s entropy can change. If a volume of gas in an insulated piston is allowed to expand, there is no heat transfer, but the system does work on its surroundings and the entropy of the system increases.