Wikidata:Property proposal/Standard molar entropy
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standard molar entropy[edit]
Originally proposed at Wikidata:Property proposal/Natural science
| Description | entropy content of one mole of substance under standard conditions |
|---|---|
| Represents | standard molar entropy (Q764278) |
| Data type | Number (not available yet) |
| Domain | chemicals and chemical elements |
| Allowed units | joule per mole kelvin (Q20966455) |
| Example | ethanol (Q153) → 159.86 joule per mole kelvin (Q20966455), liquid. State of matter has to be defined as qualifier using phase of matter (P515) |
| Source | any textbook of chemistry |
- Motivation
Notified participants of WikiProject Chemistry Add properties to describe thermochemical values of chemicals and chemical elements. Snipre (talk) 09:01, 28 July 2016 (UTC)
- Discussion
- Why are you proposing joule per kilogram kelvin (Q3085309) as an allowed unit when the stated name of the property includes "molar"? --Izno (talk) 12:39, 28 July 2016 (UTC)
- @Izno: Because I don't know if old data are given for mol too or not. Even if current values are given for one mole of substance, sometimes old standard fixed other units for that property. I had recently the case of standard enthalpy of formation where the definition of the standard conditions was changing over the decades. Snipre (talk) 08:24, 29 July 2016 (UTC)
- Let's go with restricting it to molar units for now, or rename the property ("standard entropy"). I'm not particularly for either of those solutions, but I don't want old definitions to cause us to rename it later. --Izno (talk) 11:23, 29 July 2016 (UTC)
- @Izno: Corrected Snipre (talk) 13:24, 29 July 2016 (UTC)
- Let's go with restricting it to molar units for now, or rename the property ("standard entropy"). I'm not particularly for either of those solutions, but I don't want old definitions to cause us to rename it later. --Izno (talk) 11:23, 29 July 2016 (UTC)
- @Izno: Because I don't know if old data are given for mol too or not. Even if current values are given for one mole of substance, sometimes old standard fixed other units for that property. I had recently the case of standard enthalpy of formation where the definition of the standard conditions was changing over the decades. Snipre (talk) 08:24, 29 July 2016 (UTC)
I think J/mol-K and J/mol-kg are correct. Standard entropy would have J/K as a unit, but std molar entropy is an intesive property and there must be something like mass etc. in the unitSorry, I misunderstood you. ∼Wostr (talk) 17:47, 28 July 2016 (UTC) Maybe there should be more units allowed as cal/Celsius-kgmol?
Support. ∼Wostr (talk) 17:43, 28 July 2016 (UTC)- Support --Tobias1984 (talk) 12:17, 29 July 2016 (UTC)
Done @Snipre, Wostr, Tobias1984: Please make good use of it.
--- Jura 17:56, 10 August 2016 (UTC)
