We can understand Thermodynamic concept of energy with the help of following diagram.
Energy in storage is sometimes also referred as Internal energy. It is a point function.
Energy in transit is a path function.
Different types of work transfer
- Displacement or P*dV work
- Paddle wheel work
- Flow work
- Shaft work
Also read:
What is Thermodynamic Equilibrium?
What is a Thermodynamic State?