4. Match each of the four types of equilibrium with their respective definition by writing in the respective parenthesis next to each "equilibrium type" the letter of their respective definitions

under 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.