Question

What do you understand by state function? Neither $q$ nor $w$ is a state function but $q+w$ is a state function. Explain.

Answer 1

State function is a property whose value depends only upon the state of

system an is independent of the path, $q$ and $w$ are not state

functions because they depends upon path. But $q+w=AE$ which is a

state function. $AE$ does not depend upon path.