Tracking the Movement of Energy in Closed Systems

Science · Published 22 October 2026 Swipe more like this →

In short: This video breaks down the fundamental laws of thermodynamics by showing how internal energy shifts when heat or work interacts with a system. It moves from theory to practice with three distinct engineering scenarios.

The core of the lesson focuses on internal energy (U) and how it fluctuates based on the energy added to or removed from a closed system. By analyzing these changes, engineers can predict how substances behave under different physical constraints.

The video demonstrates these principles through three specific solved examples: a 0.5-m³ rigid tank containing refrigerant-134a, a 10-L vessel holding a liquid water mixture, and a rigid container featuring a stirring device.

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