State and state Function State Function (State Quantity, State Variable) A property of a system that depends only on the current state of the system, not on the way how the system acquired that state, (i.e. independent of path) Only depends on the initial state and the final state H2O(s,25°C,1atm) H2O(g,25°C,1atm) H2O(,25°C,1atm)State and State Function  State Function (State Quantity, State Variable)  A property of a system that depends only on the current state of the system, not on the way how the system acquired that state, (i.e. independent of path).  Only depends on the initial state and the final state. 4 H2O (s, 25 ºC, 1atm )  H2O (g, 25 ºC, 1atm )   H2O (l, 25 ºC, 1atm )