Has solid line around the diagram. Does not have any heat or work coming into or out of the system.

University of California, Davis

Display the types of energy interactions that occur in an open system where a system interacts with the environment or a closed system where a system has two or more substances interacting with each other.

Energy Interaction Diagram

Physics Libretext

Dashed line around the diagram. Has heat or work coming in or out of the system.

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