A property of a system
that is determined by the state
or condition of the system and not by how it got to that state; its value is fixed when temperature
, and physical form are specified.
A state function, then, is a function
that is dependent on state variables
. A state variable
is a characteristic that defines the set of condition
s a given system
is under. For example, temperature
are both variables that you are likely to find in a state function.
Chemistry includes state functions such as the equations for pressure, volume, temperature, enthalpy, entropy, etc.