In thermodynamics, systems can typically be classified into five major categories: isolated, closed, open, adiabatic, and non-adiabatic systems. Here, we'll classify each system based on the information provided and make necessary assumptions where appropriate.
### a. A solid bar of copper
- **Classification**: Closed System
- **Explanation**: Assume the bar is insulated from its surroundings. It can exchange heat with the surroundings but does