State and state Function o State State: ensemble of all physical and chemical properties of a system ■ Example I mol H2 1 mol H 0°C.1atm 00C.0.5atm 22.4dm3 44.8dm State 1 State 2 3State and State Function  State  State: ensemble of all physical and chemical properties of a system  Example: 3 1 mol H2 1 mol H2 0 ºC , 1 atm  0 ºC , 0.5 atm 22.4 dm3 44.8 dm3 State 1 State 2