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the claim
For an ideal gas, the internal energy change with respect to volume at constant temperature is zero
the verdict
COMMON KNOWLEDGE
no citation needed for this one
refutedsupported
the weight of evidence
no sources on either side

The internal energy of an ideal gas depends solely on its temperature and is independent of its volume (Joule's second law), making this statement a textbook definition that does not require citation.

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The analysis

The claim states a fundamental law of thermodynamics regarding ideal gases (often referred to as Joule's law or a direct consequence of the ideal gas equation and internal energy dependence solely on temperature). As a foundational definition taught in introductory physics and chemistry, it is common knowledge in thermodynamics and does not need empirical citation.

Everything we examined (12)
  1. Thermophysical Properties and Phase Behavior of CO<sub>2</sub> with Impurities: Insight from Molecular Simulations.peer-reviewedno side takennot shown: read and judged not to bear on this claim
  2. Thermodynamically Consistent Enthalpies of Adsorption of Mixtures from Classical Density Functional Theory.peer-reviewedno side takennot shown: read and judged not to bear on this claim
  3. Parametric Optimization and Performance Analysis of an Internally Cooled Structured Reactor for CO&lt;sub&gt;2&lt;/sub&gt; Direct Air Capture via Temperature-Vacuum Swing Adsorption.peer-reviewedno side takennot shown: read and judged not to bear on this claim
  4. Accumulation Function for the Ideal Air-Standard Brayton Cycle Based on Serrin's Thermodynamics.peer-reviewedno side takennot shown: read and judged not to bear on this claim
  5. Using Three Variable State Equations to Gain Insight into PEM Fuel Cell Membrane Thermodynamics.peer-reviewedno side takennot shown: read and judged not to bear on this claim
  6. Enhanced Structural Decoupling and Spatiotemporal Evolution of Thermal-Mass Coupling in LaNi&lt;sub&gt;5&lt;/sub&gt;-Based Solid-State Hydrogen Storage Reactors.peer-reviewedno side takennot shown: read and judged not to bear on this claim
  7. Carnot and Joule Cycles Implied in Generalized Entropy and Exergy Properties as Fundamentals of Extrema Principles.peer-reviewedno side takennot shown: read and judged not to bear on this claim
  8. Notes on the Jellinek-Berry Thermostated Ideal Gas.peer-reviewedno side takennot shown: read and judged not to bear on this claim
  9. An experimental study and mathematical formulation for hydrogen diffusion in water.peer-reviewedno side takennot shown: read and judged not to bear on this claim
  10. Recent Trends in Manufacturing of Thermoplastic Sandwich Structures: A Review.peer-reviewedno side takennot shown: read and judged not to bear on this claim
  11. Multiphysics Measurement Method for Supercapacitors State of Health Determination.peer-reviewedno side takennot shown: read and judged not to bear on this claim
  12. Carnot Theorem Revisited: A Critical Perspective.peer-reviewedno side takennot shown: read and judged not to bear on this claim
The paper trail · every fact has a biography
first checked05 Aug 2026
judged → COMMON KNOWLEDGE · 9505 Aug 2026
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