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9-26

standard absolute activity

URNurn:iso:std:iso:80000:-9:ed-2:en:item:9-26

https://metanorma.github.io/isq-smart/quantities/part-9/t9-26
urn:iso:std:iso:80000:-9:ed-2:en:item:9-26

ISQ Identifiers

ISO

urn:iso:std:iso:80000:-9:ed-2:en:item:9-26

IEC

urn:iec:std:iec:80000-9:2019:::item:9-26

Designations

ENstandard absolute activity

FRactivité absolue normale

Symbol

λ_{B}^{& # 8854;}

Notation systems

Rendered

λ_{B}^{& # 8854;}

AsciiMath

lambda_"B"^(⊖)

LaTeX

\lambda_{\text{B}}^{\& \# 8854 ;}

Definition

for a solute $B$ in a solution:

λ_{B}^{& # 8854;} = {lim}_{\sum b_{B} \to 0} [λ_{B} \frac{(p^{& # 8854;}) b^{& # 8854;}}{b_{B}}]

where $\sum$ denotes summation over all solutes, $p^{& # 8854;}$ is a standard pressure (ISO 80000-4: Mechanics), $b^{& # 8854;}$ is standard molality, and $b_{B}$ is the molality of substance $B$ (molality)

pour un soluté $B$ dans une solution:

λ_{B}^{& # 8854;} = {lim}_{\sum b_{B} \to 0} [λ_{B} \frac{(p^{& # 8854;}) b^{& # 8854;}}{b_{B}}]

où $\sum$ indique la sommation pour tous les solutés, $p^{& # 8854;}$ est une pression (ISO 80000-4: Mechanics) de référence, $b^{& # 8854;}$ est la molalité de référence et $b_{B}$ la molalité du soluté $B$ (molality)

Units

1

one

View related quantities →

Notes

This quantity is a function of temperature only. It especially applies to a dilute liquid solution. The standard pressure is $10^{5} unitsml(Pa)$ .

Cette grandeur n'est fonction que de la température. Cette grandeur s'applique tout particulièrement à une solution liquide diluée. La pression de référence est de $10^{5} unitsml(Pa)$ ..

Referenced by

standard equilibrium constant

Concept HierarchyPendrill (2024)

1dimensionless quantitiesLevel 0 · Kind

Broader concepts

◇ dimensionless quantities

Characterizes

● solute● solution● substance

Ontology
isq:Quantity smart:TermEntry

Class Hierarchy

smart:Entity smart:TermEntryisq:Quantity

A physical quantity as defined in ISO/IEC 80000, with associated symbols, definitions, and units of measurement.

Instance IRI

isq:t9-26

Properties

isq:QuantityShape

Property	Value
rdf:type	isq:Quantity smart:TermEntry
dcterms:identifier	9-26
skosxl:prefLabel	"standard absolute activity <in a solution>"@en
skosxl:altLabel	"lambda_"B"^(⊖)"@en
skos:definition	for a solute stem:["B"] in a solution: [stem%unnumbered] ++++ lambda_"B"^(⊖) = "lim"_(sum b_"B" -> 0) [lambda_"B"…
skos:note	This quantity is a function of temperature only. It especially applies to a dilute liquid solution. The standard pressur…
isq:hasUnit	1 (one)
isq:hasDimension	isq:Dimension
smart:hasBindingnessType	bindingness-type:normative
dcterms:isPartOf	isq:part-9

Related Entities

isq:QuantityShape isq:part-9 isq:Unit isq:Dimension isq:hasDimension smart:TermEntry