This document discusses state functions and path functions in thermodynamics. It defines a state function as a property that depends only on the initial and final states of a system and not on the path between them. Examples given are changes in internal energy, enthalpy, pressure, temperature and volume. In contrast, a path function depends on the specific path or process taken between the initial and final states, with work and heat given as examples. The document provides an overview to distinguish state functions from path functions in thermodynamics.