Thermodynamics Thermodynamic equilibrium | Britannica
Thermodynamics Thermodynamics Thermodynamic equilibrium: A particularly important concept is thermodynamic equilibrium, in which there is no tendency for the state of a system to change spontaneously. For example, the gas in a cylinder with a movable piston will be at equilibrium if the temperature and pressure inside are uniform and if the restraining force on the piston is just ...