układ termodynamiczny

All equations of state will be needed to fully characterize the thermodynamic system.

These parameters all affect the internal energy of a thermodynamic system.

So why was I conjuring the possibility of a general law for open thermodynamic systems?

Clearly, no such general law can hold for all open thermodynamic systems.

Every single thermodynamic system exists in a particular state.

Rather, it depends on the state variables of the thermodynamic system under study.

An important idea in thermodynamics is that of a thermodynamic system.

A thermodynamic system is an object or a group of objects.

An example of a thermodynamic system is a stone brick.

A thermodynamic system can be defined in terms of its states.