"Work is not a state function." Explain.

Explanation

A change of state is brought about both by doing work and by transfer of heat. The change internal energy for this case as
`DeltaU=q+w`
For a given change in state q and w vary depending on how the change is carried out. However `q+w = DeltaU` depend only on the initial and final state. It will be independent of the way the change is carried out. Thus work and heat depend on the path in which the state changes. So work is not state function but path function.