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9-32

standard equilibrium constant, thermodynamic equilibrium constant

URNurn:iso:std:iso:80000:-9:ed-2:en:item:9-32

https://metanorma.github.io/isq-smart/quantities/part-9/t9-32
urn:iso:std:iso:80000:-9:ed-2:en:item:9-32

ISQ Identifiers

ISO

urn:iso:std:iso:80000:-9:ed-2:en:item:9-32

IEC

urn:iec:std:iec:80000-9:2019:::item:9-32

Designations

ENstandard equilibrium constant

FRconstante d'équilibre normale

ENthermodynamic equilibrium constant

FRconstante d'équilibre thermodynamique

Symbol

K^{& # 8854;}

Notation systems

Rendered

K^{& # 8854;}

AsciiMath

K^(⊖)

LaTeX

K^{\& \# 8854 ;}

Definition

for a chemical reaction, product for all substances $B$ of standard absolute activity $λ_{B}^{& # 8854;}$ of substance $B$ (standard absolute activity <in a solution>) in power of minus stoichiometric number $ν_{B}$ of substance $B$ (stoichiometric number of substance):

K^{& # 8854;} = Π_{B} {(λ_{B}^{& # 8854;})}^{- ν_{B}}

pour une réaction chimique, produit pour tous les constituants $B$ de l'activité absolue normale $λ_{B}^{& # 8854;}$ du constituant $B$ (standard absolute activity <in a solution>) à la puissance - $ν_{B}$ où $ν_{B}$ est le nombre stœchiométrique du constituant $B$ (stoichiometric number of substance):

K^{& # 8854;} = Π_{B} {(λ_{B}^{& # 8854;})}^{- ν_{B}}

Units

1

one

View related quantities →

Notes

This quantity is a function of temperature only. Others depend on temperature, pressure, and composition.

One can define in an analogous way an equilibrium constant in terms of fugacity, $K_{f}$ , molality, $K_{m}$ , etc.

Cette grandeur n'est fonction que de la température. D'autres grandeurs dépendent de la température, de la pression et de la composition.

On peut définir d'une manière analogue une constante d'équilibre en termes de fugacité, $K_{f}$ , de molalité, $K_{m}$ , etc.

Concept HierarchyPendrill (2024)

1dimensionless quantitiesLevel 0 · Kind

Broader concepts

◇ dimensionless quantities

Characterizes

● 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:t9-32

Properties

isq:QuantityShape

Property	Value
rdf:type	isq:Quantity smart:TermEntry
dcterms:identifier	9-32
skosxl:prefLabel	"standard equilibrium constant"@en
skosxl:altLabel	"thermodynamic equilibrium constant"@en"K^(⊖)"@en
skos:definition	for a chemical reaction, product for all substances stem:["B"] of standard absolute activity stem:[lambda_"B"^(⊖)]…
skos:note	This quantity is a function of temperature only. Others depend on temperature, pressure, and composition. One can defin…
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