Home Quantities

Part 1111-9.1

Part 11: Characteristic Numbers·115 entries

114 / 115

Section 11-92 entries

11-9.1Arrhenius number 11-9.2Landau-Ginzburg number

11-9.1

Arrhenius number

URNurn:iso:std:iso:80000:-11:ed-2:en:item:11-9.1

Download RDF.jsonld .ttl

https://metanorma.github.io/isq-smart/quantities/part-11/t11-9.1
urn:iso:std:iso:80000:-11:ed-2:en:item:11-9.1

ISQ Identifiers

ISO

urn:iso:std:iso:80000:-11:ed-2:en:item:11-9.1

IEC

urn:iec:std:iec:80000-11:2019:::item:11-9.1

Designations

ENArrhenius number

FRnombre d'Arrhenius

Symbol

α

Notation systems

Rendered

α

AsciiMath

alpha

LaTeX

\alpha

Definition

quotient of chemical activation energy and thermal energy; in a chemical reaction it is the exponential factor of the reaction rate constant, $k$ , expressed by

$k ~ exp (α)$ , with $α = E_{0} / (R T)$ ; where

$E_{0}$ :: is activation energy (ISO 80000-5: Thermodynamics),

$R$ :: is molar gas constant (ISO 80000-9: Physical chemistry and molecular physics), and

$T$ :: is thermodynamic temperature (ISO 80000-5: Thermodynamics)

quotient de l'énergie d'activation de la réaction chimique par l'énergie thermique; dans une réaction chimique, le facteur exponentiel de la constante de vitesse de réaction, $k$ , exprimé par:

$k ~ exp (α)$ , avec $α = E_{0} / (R T)$ ; où

$E_{0}$ :: est l'énergie d'activation (ISO 80000-5: Thermodynamics);

$R$ :: est la constante molaire du gaz (ISO 80000-9: Physical chemistry and molecular physics); et

$T$ :: est la température thermodynamique (ISO 80000-5: Thermodynamics)

Concept HierarchyPendrill (2024)

1dimensionless quantitiesLevel 0 · Kind

Broader concepts

◇ dimensionless quantities

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:t11-9.1

Properties

isq:QuantityShape

Property	Value
rdf:type	isq:Quantity smart:TermEntry
dcterms:identifier	11-9.1
skosxl:prefLabel	"Arrhenius number"@en
skosxl:altLabel	"alpha"@en
skos:definition	quotient of chemical activation energy and thermal energy; in a chemical reaction it is the exponential factor of the re…
isq:hasDimension	isq:Dimension
smart:hasBindingnessType	bindingness-type:normative
dcterms:isPartOf	isq:part-11

Related Entities

isq:QuantityShape isq:part-11 isq:Unit isq:Dimension isq:hasDimension smart:TermEntry