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the claim

The IUPAC standard state for materials is defined as a pressure of 1 bar and solutions at 1 M.

the verdict
SUPPORTED
the evidence backs this
Recorded sources
4 sources for · 0 against

Counts group repeated records of the same source within each side. They do not measure evidence strength or source independence.

AS REPORTEDno primary record reached; this is what the reporting says

Is it true that the IUPAC standard state for materials is defined as a pressure of 1 bar and solutions at 1 M?

Yes. The claim is supported by reliable reference texts which confirm that the IUPAC standard state for thermodynamic properties defines pressure at 1 bar and solution concentration at 1 M.

Verdict: SUPPORTED · 4 sources for, 0 against · Last checked

How claims like this are judged

Judged against reference works: claims of this kind are settled by reference works, not journal abstracts.

Evidence for · 4
Wikipedia: Standard state
Reference article covering this claim directly
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Wikipedia: Standard state. (n.d.). Wikipedia. https://en.wikipedia.org/wiki/Standard_state

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More for · 3
LibreTexts: LibreTexts: 9.07: Enthalpy
Explicitly states the IUPAC standard state refers to materials under a pressure of 1 bar and solutions at 1 M.
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LibreTexts: LibreTexts: 9.07%3A Enthalpy. (n.d.). LibreTexts. https://chem.libretexts.org/Courses/Lumen_Learning/Book%3A_General_Chemistry__Lecture_and_Lab_(Lumen)/09%3A_Thermochemistry/9.07%3A_Enthalpy

OpenStax: OpenStax Chemistry: 5.3 Enthalpy
Explicitly states the IUPAC standard state refers to materials under a pressure of 1 bar and solutions at 1 M.
Get citation
OpenStax: OpenStax Chemistry: 5.3 Enthalpy. (n.d.). OpenStax. https://openstax.org/books/chemistry/pages/32baaf18-04e0-428f-8205-fadbbeb0cc87@

Wikipedia: Wikipedia: Standard enthalpy of formation
Confirms IUPAC standard pressure of 1 bar and a solute concentration standard state of 1 mole per liter.
Get citation
Wikipedia: Wikipedia: Standard enthalpy of formation. (n.d.). Wikipedia. https://en.wikipedia.org/wiki/Standard_enthalpy_of_formation

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