the Definitions list. Equilibrium type Thermal equilibrium Mechanical equilibrium Phase equilibrium Chemical equilibrium Definitions a) If a system involves more than one phase, the mass (concentration) of each phase does not change. b) Temperature is the same throughout the entire system (fig. 1.27). c) If the chemical composition of a system does not change with time, that is, no net chemical reactions occur. d) No change in pressure at any point of the system with time.
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