State Functions or State Variables are the physical quantity having a definite value at a particular (present state) state and value is independent from the fact how the system achieved that state.
Mathematical Condition for a function
to be a state function:-
There are three conditions that must be satisfied
simultaneously for a function to be state function.
(i) If ∆φ is a state function
It means change in ∮
depends only on end states and not on the path which it followed during the process.
(ii) If ∆φ is
a state function
It implies, in
cyclic integral as the end states are same, so ∆φ value will be zero.
(iii) If ∆φ = f(x, y) is a state function,
Euler's reciprocity theorem must be satisfied.
If ∮dz=0 then, are we sure that z = 0 state
function ?
"Change in state function (z) is fixed in between two states so ∆z is
also
a state function example ∆P,∆T,∆V,∆H= state function is a wrong statement"
