PPT Slide
- Amount of work and heat available from a change depend on how the change occurs; total _E, the sum of heat and work, does not.
_E is constant, but q and w can vary.
- The internal energy (E) of a system is a state function, a property of the system that can be determined completely by its current state.
Changes in E, P, and V depend only on the initial and final states.
- Heat (q) and work (w) are not state functions since they do depend on the path the system takes in undergoing the change in energy.