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The Work Done given Internal Energy formula calculates the work done by or on a system based on the change in heat energy and the internal energy of the system. It provides a fundamental relationship in thermodynamics between work, heat, and internal energy.
The calculator uses the formula:
Where:
Explanation: This formula represents the first law of thermodynamics, stating that the work done by the system equals the heat added to the system minus the change in internal energy.
Details: Accurate work done calculation is crucial for analyzing thermodynamic systems, energy conversion processes, and understanding the relationship between heat transfer and mechanical work in various engineering applications.
Tips: Enter change in heat energy and internal energy of the system in Joules. Both values must be non-negative numbers.
Q1: What does a negative work done value indicate?
A: A negative work done value indicates that work is being done on the system rather than by the system.
Q2: How is this formula related to the first law of thermodynamics?
A: This formula is a direct application of the first law of thermodynamics: ΔU = Q - W, rearranged to solve for work done.
Q3: What are typical units for these measurements?
A: The standard SI unit for all energy quantities in this formula is the Joule (J), though calories or BTUs may be used with proper conversion.
Q4: When is this formula most commonly applied?
A: This formula is commonly used in thermodynamic analysis of closed systems, particularly in heat engines, refrigerators, and other energy conversion devices.
Q5: Are there limitations to this equation?
A: This equation applies to closed systems and assumes that all energy transfers are accounted for. It may need modification for open systems or systems with other energy transfers.