 # What Is The Difference Between A State Function And A Non State Function?

## What is a non state function?

Non-state function – the path you take makes a difference in where you want to end up or what the values will be.

Example: The distance between two cities depends on the path you take.

Your distance traveled will be different in each case.

In terms of chemistry, pressure, volume, temperature are all state functions..

## What is the opposite of a state function?

The opposite to a state function is a path dependency; work and heat are path dependent in general. A change in state is not a function of state, by definition it is a function of two states, so it would be a bi-state function.

## What is meant by state function?

A state function describes the equilibrium state of a system, thus also describing the type of system. … Internal energy, enthalpy, and entropy are examples of state quantities because they quantitatively describe an equilibrium state of a thermodynamic system, regardless of how the system arrived in that state.

## Which one is not thermodynamic state function?

Heat (q) and work (W) are not state functions being path dependent. A state function is the property of the system whose value depends only on the initial and final state of the system and is independent of the path.

## Why Heat is not a state function?

A state function is independent of pathways taken to get to a specific value, such as energy, temperature, enthalpy, and entropy. Enthalpy is the amount of heat released or absorbed at a constant pressure. Heat is not a state function because it is only to transfer energy in or out of a system; it depends on pathways.

## How do you determine a state function?

trivially: if a quantity is uniquely determined by the equilibrium state then it is a state function, otherwise it is not. ΔU is clearly not a state function, since by its very definition (ΔU=Ufinal−Uinitial) it is not determined uniquely by the state of the system: neither by the final, nor by the initial one.