{"term":{"id":"00418","title":"apparent","longtitle":"IUPAC Gold Book - apparent","doi":"10.1351\/goldbook.A00418","code":"A00418","status":"current","synonym":"<em>synonym<\/em>: apparent quantity","definitions":[{"id":1,"text":"A term, indicated by a superscript ', which means that a process is not well known or that its value carries uncertainties which are not known, e.g. \\(\\Delta G^{\\circ}{'}\\) is the apparent standard Gibbs energy change. In the context of partial molar quantities the word is used in a different sense; as a symbol for 'apparent' in this connection the use of subscript \\(\\varphi \\), as in \\(Y_{\\varphi}\\), is recommended. Other notations employed for this property include \\(^{\\varphi}X\\) and \\(\\varphi_{X}\\).","contexts":[],"links":[{"term":"partial molar quantities","url":"https:\/\/goldbook.iupac.org\/\/terms\/view\/P04418"}],"sources":["PAC, 1986, 58, 1405. 'Recommendations for the presentation of thermodynamic and related data in biology (Recommendations 1985)' on page 1408 (https:\/\/doi.org\/10.1351\/pac198658101405)"]}],"altoutputs":{"html":"https:\/\/goldbook.iupac.org\/terms\/view\/A00418\/html","xml":"https:\/\/goldbook.iupac.org\/terms\/view\/A00418\/xml","plain":"https:\/\/goldbook.iupac.org\/terms\/view\/A00418\/plain"},"citation":"Citation: 'apparent' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. 10.1351\/goldbook.A00418","license":"The IUPAC Gold Book is licensed under Creative Commons Attribution-ShareAlike CC BY-SA 4.0 International (https:\/\/creativecommons.org\/licenses\/by-sa\/4.0\/) for individual terms.","collection":"If you are interested in licensing the Gold Book for commercial use, please contact the IUPAC Executive Director at executivedirector@iupac.org .","disclaimer":"The International Union of Pure and Applied Chemistry (IUPAC) is continuously reviewing and, where needed, updating terms in the Compendium of Chemical Terminology (the IUPAC Gold Book). Users of these terms are encouraged to include the version of a term with its use and to check regularly for updates to term definitions that you are using.","accessed":"2026-07-24T15:10:46+00:00"}}