11. Equilibrium conditions of thermodynamic systems are related to the maximum property of the entropy. 12. A thermodynamic system is in equilibrium when it is no longer changing in time. 13. A thermodynamic meter is any device which measures any parameter of a thermodynamic system . 14. An empirical temperature is a numerical scale for the hotness of a thermodynamic system . 15. Thermodynamic potentials can be derived from the energy balance equation applied to a thermodynamic system . 16. This result applies to homogeneous, macroscopic systems, but not to all thermodynamic systems . 17. This statement asserts that thermal equilibrium is a left-Euclidean relation between thermodynamic systems . 18. Often the surroundings of a thermodynamic system may also be regarded as another thermodynamic system. 19. Often the surroundings of a thermodynamic system may also be regarded as another thermodynamic system . 20. The equilibrium state of a thermodynamic system is described by specifying its " state ".
