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

Open System E-I diagram

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

Closed System E-I Diagram

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.

University of California, Davis

Energy cannot be created nor destroyed. Energy is transferred through heat or work. The formula is ΔEtotal = Q + W (Where Q is heat and W is work).

Conservation of Energy

Physics Libretext

Energy Interaction Diagram

A graph comparing energy added and temperature that shows a substance at its three phases.

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