Clausius theorem

proper noun

A theorem stating that, for a thermodynamic system exchanging heat with external reservoirs and undergoing a thermodynamic cycle, ∮(δQ)/(T_surr)≤0,, where δQ is the infinitesimal amount of heat absorbed by the system from the reservoir, and T_surr is the temperature of the external reservoir (surroundings) at a particular instant in time.

Meanings

proper nounthe Clausius theorem
  1. A theorem stating that, for a thermodynamic system exchanging heat with external reservoirs and undergoing a thermodynamic cycle, ∮(δQ)/(T_surr)≤0,, where δQ is the infinitesimal amount of heat absorbed by the system from the reservoir, and T_surr is the temperature of the external reservoir (surroundings) at a particular instant in time.

Origin

Developed by German physicist and mathematician Rudolf Clausius.

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Cite this entry
APA

Clausius theorem. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/Clausius%20theorem

MLA

“Clausius theorem.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/Clausius%20theorem. Accessed November 4, 2026.

Chicago

WatkinsX Dictionary, s.v. “Clausius theorem,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/Clausius%20theorem.

Source: Clausius theorem on Wiktionary, CC BY-SA 4.0.