21. The set of possible microstates are also reflected in the constraints upon the thermodynamic system . 22. :In any thermodynamic system , one must first consider if the system is closed. 23. There are scholars who believe that one can model the economy as a thermodynamic system . 24. The entropy of the thermodynamic system is a measure of how far the equalization has progressed. 25. A thermodynamic system in its own state of internal thermodynamic equilibrium has a spatially uniform temperature. 26. The physical and chemical properties of the working fluid are extremely important when designing thermodynamic systems . 27. Energy can also be transferred from one thermodynamic system to another in association with transfer of matter. 28. Where " n " is the number of moles in the body or thermodynamic system . 29. The thermodynamic state of a thermodynamic system is its internal state as specified by its state variables. 30. But it can be used to predict features of nonequilibrium thermodynamic systems as they evolve over time.