What is the mathematical expression of the First Law of Thermodynamics?
Formula: Δ U = Q + W or Δ U = Q - W'. Explanation: The change in the internal energy of a system Δ U equals the heat added to the system Q plus the work done o…
Syllabus path: Thermal Physics › First Law of Thermodynamics
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CSCA Physics Formula Reference
Formula and explanation
Formula: Δ U = Q + W or Δ U = Q - W'. Explanation: The change in the internal energy of a system Δ U equals the heat added to the system Q plus the work done on the system W. In another common convention, W' represents work done by the system, then Δ U = Q - W'. Applicability: Applicable to any thermodynamic system (macroscopic, quasi - static processes).
Related tutorial and examples
First Law of Thermodynamics
First Law of Thermodynamics 1. Core Concepts & Sign Convention The First Law of Thermodynamics is essentially the Law of Conservation of Energy applied to thermal processes. For a system (like gas in a cylinder), the change in internal energy Δ U equals the sum of heat Q supplied…
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