Quantities and units - Part 9: Physical chemistry and molecular physics (ISO 80000-9:2009 + Amd 1:2011)

ISO 80000-9:2009 gives names, symbols, and definitions for quantities and units of physical chemistry and molecular physics. Where appropriate, conversion factors are also given.

Größen und Einheiten - Teil 9: Physikalische Chemie und Molekularphysik (ISO 80000-9:2009 + Amd 1:2011)

ISO 80000-9 enthält Benennungen, Formelzeichen und Definitionen für Größen und Einheiten der physikalischen Chemie und der Molekularphysik. Wo benötigt, sind auch Umrechnungsfaktoren aufgeführt.

Grandeurs et unités - Partie 9: Chimie physique et physique moléculaire (ISO 80000-9:2009 + Amd 1:2011)

L'ISO 80000‑9:2009 donne les noms, les symboles et les définitions des grandeurs et unités de chimie physique et de physique moléculaire. Des facteurs de conversion sont également indiqués, s'il y a lieu.

Veličine in enote - 9. del: Fizikalna kemija in molekulska fizika (ISO 80000-9:2009 + Amd 1:2011)

Standard ISO 80000-9:2009 podaja imena, simbole in definicije za veličine in enote s področja fizikalne kemije in molekulske fizike. Kjer je primerno, so navedeni tudi pretvorniki (pretvorni faktorji).

General Information

Status
Withdrawn
Publication Date
02-Apr-2013
Withdrawal Date
08-Oct-2019
Current Stage
9960 - Withdrawal effective - Withdrawal
Completion Date
09-Oct-2019

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SIST EN ISO 80000-9:2013
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1DGRPHãþD
SIST ISO 31-8:1995/Amd.1:2001
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Quantities and units - Part 9: Physical chemistry and molecular physics (ISO 80000-

9:2009 + Amd 1:2011)

Größen und Einheiten - Teil 9: Physikalische Chemie und Molekularphysik (ISO 80000-

9:2009 + Amd 1:2011)

Grandeurs et unités - Partie 9: Chimie physique et physique moléculaire (ISO 80000-

9:2009 + Amd 1:2011)
Ta slovenski standard je istoveten z: EN ISO 80000-9:2013
ICS:
01.060 9HOLþLQHLQHQRWH Quantities and units
07.030 Fizika. Kemija Physics. Chemistry
SIST EN ISO 80000-9:2013 en

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 80000-9:2013
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SIST EN ISO 80000-9:2013
EUROPEAN STANDARD
EN ISO 80000-9
NORME EUROPÉENNE
EUROPÄISCHE NORM
April 2013
ICS 01.060
English Version
Quantities and units - Part 9: Physical chemistry and molecular
physics (ISO 80000-9:2009 + Amd 1:2011)

Grandeurs et unités - Partie 9: Chimie physique et Größen und Einheiten - Teil 9: Physikalische Chemie und

physique moléculaire (ISO 80000-9:2009 + Amd 1:2011) Molekularphysik (ISO 80000-9:2009 + Amd 1:2011)

This European Standard was approved by CEN on 14 March 2013.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European

Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national

standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by translation

under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same

status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,

Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,

Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United

Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: Avenue Marnix 17, B-1000 Brussels

© 2013 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 80000-9:2013: E

worldwide for CEN national Members.
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SIST EN ISO 80000-9:2013
EN ISO 80000-9:2013 (E)
Contents Page

Foreword ....................................................................................................................................................... 3

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SIST EN ISO 80000-9:2013
EN ISO 80000-9:2013 (E)
Foreword

The text of ISO 80000-9:2009 + Amd 1:2011 has been prepared by Technical Committee ISO/TC 12

“Quantities and units” of the International Organization for Standardization (ISO) and has been taken over as

EN ISO 80000-9:2013.

This European Standard shall be given the status of a national standard, either by publication of an identical

text or by endorsement, at the latest by October 2013, and conflicting national standards shall be withdrawn at

the latest by October 2013.

Attention is drawn to the possibility that some of the elements of this document may be the subject of patent

rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.

According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following

countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech

Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece,

Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,

Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.

Endorsement notice

The text of ISO 80000-9:2009 + Amd 1:2011 has been approved by CEN as EN ISO 80000-9:2013 without

any modification.
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SIST EN ISO 80000-9:2013
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SIST EN ISO 80000-9:2013
INTERNATIONAL ISO
STANDARD 80000-9
First edition
2009-04-01
Quantities and units —
Part 9:
Physical chemistry and molecular
physics
Grandeurs et unités —
Partie 9: Chimie physique et physique moléculaire
Reference number
ISO 80000-9:2009(E)
ISO 2009
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SIST EN ISO 80000-9:2013
ISO 80000-9:2009(E)
PDF disclaimer

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© ISO 2009

All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means,

electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or

ISO's member body in the country of the requester.
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Published in Switzerland
ii ISO 2009 – All rights reserved
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SIST EN ISO 80000-9:2013
ISO 80000-9:2009(E)
Contents Page

Foreword........................................................................................................................................................ iv

Introduction .................................................................................................................................................... v

1 Scope .................................................................................................................................................... 1

2 Normative references .......................................................................................................................... 1

3 Names, symbols, and definitions ....................................................................................................... 1

Annex A (normative) Atomic numbers, names, and symbols for the chemical ................................... 32

Annex B (normative) Symbols for chemical elements and nuclides ..................................................... 34

Annex C (normative) pH ............................................................................................................................ 35

Bibliography ............................................................................................................................................... 37

ISO 2009 – All rights reserved iii
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Foreword

ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies

(ISO member bodies). The work of preparing International Standards is normally carried out through ISO

technical committees. Each member body interested in a subject for which a technical committee has been

established has the right to be represented on that committee. International organizations, governmental and

non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International

Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.

International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.

The main task of technical committees is to prepare International Standards. Draft International Standards

adopted by the technical committees are circulated to the member bodies for voting. Publication as an

International Standard requires approval by at least 75 % of the member bodies casting a vote.

Attention is drawn to the possibility that some of the elements of this document may be the subject of patent

rights. ISO shall not be held responsible for identifying any or all such patent rights.

ISO 80000-9 was prepared by Technical Committee ISO/TC 12, Quantities and units.

This first edition of ISO 80000-9 cancels and replaces ISO 31-8:1992. It also incorporates the Amendment

ISO 31-8:1992/Amd.1:1998. The major technical changes from the previous standard are the following:

— the presentation of Numerical statements has been changed;
— the Normative references have been changed;
— some new items have been introduced;
— some new chemical elements have been introduced in Annex A;
— Annex C on pH has been revised and given a completely new text.

ISO 80000 consists of the following parts, under the general title Quantities and units:

— Part 1: General

— Part 2: Mathematical signs and symbols to be used in the natural sciences and technology

— Part 3: Space and time
— Part 4: Mechanics
— Part 5: Thermodynamics
— Part 7: Light
— Part 8: Acoustics
— Part 9: Physical chemistry and molecular physics
— Part 10: Atomic and nuclear physics
— Part 11: Characteristic numbers
— Part 12: Solid state physics

IEC 80000 consists of the following parts, under the general title Quantities and units:

— Part 6: Electromagnetism
— Part 13: Information science and technology
— Part 14: Telebiometrics related to human physiology
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Introduction
0.1 Arrangements of the tables

The tables of quantities and units in this International Standard are arranged so that the quantities are

presented on the left-hand pages and the units on the corresponding right-hand pages.

All units between two full lines on the right-hand pages belong to the quantities between the corresponding full

lines on the left-hand pages.

Where the numbering of an item has been changed in the revision of a part of ISO 31, the number in the

preceding edition is shown in parentheses on the left-hand page under the new number for the quantity; a dash

is used to indicate that the item in question did not appear in the preceding edition.

0.2 Tables of quantities

The names in English and in French of the most important quantities within the field of this International

Standard are given together with their symbols and, in most cases, their definitions. These names and symbols

are recommendations. The definitions are given for identification of the quantities in the International System of

Quantities (ISQ), listed on the left-hand pages of the table; they are not intended to be complete.

The scalar, vectorial or tensorial character of quantities is pointed out, especially when this is needed for the

definitions.

In most cases only one name and only one symbol for the quantity are given; where two or more names or two

or more symbols are given for one quantity and no special distinction is made, they are on an equal footing.

When two types of italic letters exist (for example as with ϑ and θ; ϕ and φ; a and a; g and g) only one of these

is given. This does not mean that the other is not equally acceptable. It is recommended that such variants

should not be given different meanings. A symbol within parentheses implies that it is a reserve symbol, to be

used when, in a particular context, the main symbol is in use with a different meaning.

In this English edition, the quantity names in French are printed in an italic font, and are preceded by fr. The

gender of the French name is indicated by (m) for masculine and (f) for feminine, immediately after the noun in

the French name.
0.3 Tables of units
0.3.1 General

The names of units for the corresponding quantities are given together with the international symbols and the

definitions. These unit names are language-dependent, but the symbols are international and the same in all

languages. For further information, see the SI Brochure (8th edition 2006) from BIPM and ISO 80000-1 .

The units are arranged in the following way:

a) The coherent SI units are given first. The SI units have been adopted by the General Conference on

Weights and Measures (Conférence Générale des Poids et Mesures, CGPM). The use of coherent SI units

1) To be published.
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is recommended; decimal multiples and submultiples formed with the SI prefixes are recommended, even

though not explicitly mentioned.

b) Some non-SI units are then given, being those accepted by the International Committee for Weights and

Measures (Comité International des Poids et Mesures, CIPM), or by the International Organization of Legal

Metrology (Organisation Internationale de Métrologie Légale, OIML), or by ISO and IEC, for use with the SI.

Such units are separated from the SI units in the item by use of a broken line between the SI units and the

other units.

c) Non-SI units currently accepted by the CIPM for use with the SI are given in small print (smaller than the text

size) in the “Conversion factors and remarks” column.

d) Non-SI units that are not recommended are given only in annexes in some parts of this International

Standard. These annexes are informative, in the first place for the conversion factors, and are not integral

parts of the standard. These deprecated units are arranged in two groups:
1) units in the CGS system with special names;
2) units based on the foot, pound, second, and some other related units.

e) Other non-SI units are given for information, especially regarding the conversion factors, in informative

annexes in some parts of this International Standard.

0.3.2 Remark on units for quantities of dimension one, or dimensionless quantities

The coherent unit for any quantity of dimension one, also called a dimensionless quantity, is the number one,

symbol 1. When the value of such a quantity is expressed, the unit symbol 1 is generally not written out

explicitly.
EXAMPLE 1 Refractive index n = 1,53× 1 = 1,53

Prefixes shall not be used to form multiples or submultiples of this unit. Instead of prefixes, powers of 10 are

recommended.
EXAMPLE 2 Reynolds number Re = 1,32× 10

Considering that plane angle is generally expressed as the ratio of two lengths and solid angle as the ratio of

two areas, in 1995 the CGPM specified that, in the SI, the radian, symbol rad, and steradian, symbol sr, are

dimensionless derived units. This implies that the quantities plane angle and solid angle are considered as

derived quantities of dimension one. The units radian and steradian are thus equal to one; they may either be

omitted, or they may be used in expressions for derived units to facilitate distinction between quantities of

different kinds but having the same dimension.
0.4 Numerical statements in this International Standard

The sign = is used to denote “is exactly equal to”, the sign ≈ is used to denote “is approximately equal to”, and

the sign := is used to denote “is by definition equal to”.

Numerical values of physical quantities that have been experimentally determined always have an associated

measurement uncertainty. This uncertainty should always be specified. In this International Standard, the

magnitude of the uncertainty is represented as in the following example.
EXAMPLE l = 2,347 82(32) m

In this example, l = a(b) m, the numerical value of the uncertainty b indicated in parentheses is assumed to

apply to the last (and least significant) digits of the numerical value a of the length l. This notation is used when

b represents one standard uncertainty (estimated standard deviation) in the last digits of a. The numerical

example given above may be interpreted to mean that the best estimate of the numerical value of the length l

(when l is expressed in the unit metre) is 2,347 82, and that the unknown value of l is believed to lie between

(2,347 82− 0,000 32) m and (2,347 82 + 0,000 32) m with a probability determined by the standard

uncertainty 0,000 32 m and the probability distribution of the values of l.
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0.5 Special remarks

In this part of ISO 80000, symbols for substances are shown as subscripts, for example c , w , p .

B B

Generally, it is advisable to put symbols for substances and their states in parentheses on the same line as the

main symbol, for example c(H SO ).
2 4

The superscript is used to mean “pure”. The superscript is used to mean “standard”.

−3 ◦
EXAMPLE 1 V (K SO , 0,1 mol· dm in H O, 25 C) for molar volume.
2 4 2
� −1 −1

EXAMPLE 2 C (H O, g, 298,15 K) = 33,58 J· K · mol for standard molar heat capacity at constant pressure.

m,p
∗ ∗

ln an expression such as ϕ = x V / x V , where ϕ denotes the volume fraction of a particular

B B i B
m,B m,i

substance B in a mixture of substances A, B, C, …, where x denotes the amount-of-substance fraction of i and

∗ ∗ ∗ ∗

V the molar volume of the pure substance i, and where all the molar volumes V , V , V , ... are taken

m,i m,A m,B m,C

at the same temperature and pressure, the summation on the right-hand side is that over all the substances A,

B, C, ... of which a mixture is composed, so that x = 1.
The names and symbols of the chemical elements are given in Annex A.

Additional qualifying information on a quantity symbol may be added as a subscript or superscript or in

parentheses after the symbol.
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viii
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INTERNATIONAL STANDARD ISO 80000-9:2009(E)
Quantities and units —
Part 9:
Physical chemistry and molecular physics
1Scope

ISO 80000-9 gives names, symbols, and definitions for quantities and units of physical chemistry and molecular

physics. Where appropriate, conversion factors are also given.
2 Normative references

The following referenced documents are indispensable for the application of this document. For dated

references, only the edition cited applies. For undated references, the latest edition of the referenced document

(including any amendments) applies.
ISO 80000-3:2006, Quantities and units — Part 3: Space and time
ISO 80000-4:2006, Quantities and units — Part 4: Mechanics
ISO 80000-5:2007, Quantities and units — Part 5: Thermodynamics
IEC 80000-6:2008, Quantities and units — Part 6: Electromagnetism
3 Names, symbols, and definitions

The names, symbols, and definitions for quantities and units of physical chemistry and molecular physics are

given on the following pages.
ISO 2009 – All rights reserved 1
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ISO 80000-9:2009(E)
PHYSICAL CHEMISTRY AND MOLECULAR PHYSICS QUANTITIES
Item No. Name Symbol Definition Remarks
9-1 amount of n amount of substance is one of the Amount of substance of a pure
(8-3) substance seven base quantities in the sample is that quantity that can
fr quantité (f) de International System of Quantities, often be determined by
matière ISQ, on which the SI is based measuring its mass and
dividing by the molar mass of
the sample.
Amount of substance is
defined to be proportional to
the number of specified
elementary entities in a
sample, the proportionality
constant being a universal
constant which is the same for
all samples.
The name “number of moles”
is often used for “amount of
substance”, but this is
deprecated because the name
of a quantity should be
distinguished from the name of
the unit.
In the name “amount of
substance”, the words “of
substance” could, for
simplicity, be replaced by
words to specify the substance
concerned in any particular
application, so that one may,
for example, talk of “amount of
hydrogen chloride, HCl”, or
“amount of benzene, C H ”.
6 6
It is important to always give a
precise specification of the
entity involved (as emphasized
in the second sentence of the
definition of the mole); this
should preferably be done by
giving the molecular chemical
formula of the material
involved.
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UNITS PHYSICAL CHEMISTRY AND MOLECULAR PHYSICS
Inter-
Conversion factors and
Item No. Name national Definition
remarks
symbol
9-1.a mole mol the mole is the amount of When the mole is used, the
substance of a system which elementary entities shall be
contains as many elementary specified and may be atoms,
entities as there are atoms in molecules, ions, electrons,
0,012 kg of carbon 12 other entities or specified
groups of them.
[14th CGPM (1971)]
The definition applies to
unbound atoms of carbon 12,
at rest and in their ground
state.
The mole is also used for
entities such as holes and
other quasi-particles, double
bonds, etc.
(continued)
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PHYSICAL CHEMISTRY AND MOLECULAR PHYSICS QUANTITIES
Item No. Name Symbol Definition Remarks
A (Cl)≈ 35,453
9-2.1 relative atomic A ratio of the average mass EXAMPLE
(8-1.1) mass (ISO 80000-4:2006, item 4-1)
The relative atomic or relative
fr masse (f) per atom of an element to 1/12
molecular mass depends on the
atomique of the mass of an atom of the
nuclidic composition.
relative nuclide C
The International Union of Pure
and Applied Chemistry (IUPAC)
9-2.2 relative molecular M ratio of the average mass per
accepts the use of the special
(8-1.2) mass molecule or specified entity of a
names “atomic weight” and
fr masse (f) substance to 1/12 of the mass of
“molecular weight” for the
moléculaire an atom of the nuclide C
quantities “relative atomic mass”
relative
and “relative molecular mass”,
respectively. The use of these
traditional names is deprecated.

9-3 number of particles N N equals the number of Different entities may be used as

B B
(8-2) fr nombre (m) particles in a system a particle, e.g. number of
de particules molecules, number of atoms.
A subscript added to the symbol
indicates a specific entity, e.g. N
for the number of molecules of
substance B.
9-4 Avogadro constant L, N for a pure sample
A L = 6,022 141 79(30)×
(8-4) fr constante (f)
23 −1 23 −1
10 mol 10 mol
L = N/n
d'Avogadro
[CODATA 2006]
where N is the number of
particles (item 9-3) and n is
amount of substance (item 9-1)
9-5 molar mass M for a pure sample
(8-5) fr masse (f) molaire
M = m/n
where mis mass
(ISO 80000-4:2006, item 4-1)
and n is amount of substance
(item 9-1)
9-6 molar volume V for a pure sample The molar volume of an ideal gas
(8-6) fr volume (m) at 273,15 K and 101 325 Pa is
V = V/n
m 3
molaire V = 0,022 413 996 (39) m /mol
and, for 273,15 K and 100 000 Pa,
where Vis volume
(ISO 80000-3:2006, item 3-4) the molar volume is
V = 0,022 710 981 (40) m /mol
and n is amount of substance .
(item 9-1)
[CODATA 2006]
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UNITS PHYSICAL CHEMISTRY AND MOLECULAR PHYSICS
Inter-
Conversion factors and
Item No. Name national Definition
remarks
symbol
9-2.a one 1 See the Introduction, 0.3.2.
9-3.a one 1 See the Introduction, 0.3.2.
9-4.a mole to the power mol
minus one
9-5.a kilogram per mole kg/mol The commonly used unit for
molar mass is gram per mole,
g/mol, rather than kilogram per
mole, kg/mol.
9-6.a cubic metre per m /mol
mole
(continued)
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PHYSICAL CHEMISTRY AND MOLECULAR PHYSICS QUANTITIES
Item No. Name Symbol Definition Remarks
9-7 molar internal U U = U/n Similar definitions apply to
m m
(8-7) energy other thermodynamic
where U is internal energy
fr énergie (f) interne functions, for example molar
(ISO 80000-5:2007, item 5-20.2)
molaire
enthalpy, H , molar Helmholz
and n is amount of substance (item
energy, A , and molar Gibbs
9-1)
energy, G . These quantities
are normally only used with
9-8 molar heat capacity C C = C/n
m m
reference to pure substances.
(8-8) fr capacité (f)
where C is heat capacity
Molar heat capacity may be
thermique
(ISO 80000-5:2007, item 5-15) and
defined at constant pressure,
molaire
n is amount of substance (item
or at constant volume,
m,p
9-1)
C .
m,V
9-9 molar entropy S S = S/n
m m
(8-9) fr entropie (f)
where S is entropy
molaire
(ISO 80000-5:2007, item 5-18) and
n is amount of substance (item
9-1)
9-10.1 volumic number of n, (C) n = N/V
(8-10.1) molecules or
where N is the number of particles
other elementary
(item 9-3) and V is volume
entities,
(ISO 80000-3:2006, item 3-4)
number density of
molecules or
other elementary
entities
fr nombre (m)
volumique
de molécules
ou d'autres
entités
élémentaires
9-10.2 molecular C C = N /V
B B B
(8-10.2) concentration of
where N is the number of
substance B
molecules of B and V is the
fr concentration (f)
volume (ISO 80000-3:2006, item
moléculaire du
3-4) of the mixture
constituant B
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UNITS PHYSICAL CHEMISTRY AND MOLECULAR PHYSICS
Inter-
Conversion factors and
Item No. Name national Definition
remarks
symbol
9-7.a joule per mole J/mol
9-8.a joule per mole J/(mol · K)
kelvin
9-9.a joule per mole J/(mol · K)
kelvin
9-10.a metre to the power m
minus three
(continued)
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PHYSICAL CHEMISTRY AND MOLECULAR PHYSICS QUANTITIES
Item No. Name Symbol Definition Remarks
9-11.1 mass density, ρ, (γ) ρ = m/V
(8-11.1) density
where m is mass
fr masse (f)
(ISO 80000-4:2006, item 4-1) and
volumique
V is volume (ISO 80000-3:2006,
item 3-4)
9-11.2 mass concentration ρ , (γ ) ρ = m /V
B B B B
(8-11.2) of substance B
where m is the mass
fr concentration (f)
(ISO 80000-4:2006, item 4-1) of
en masse du
substance B and V is the volume
constituant B
(ISO 80000-3:2006, item 3-4) of
the mixture
9-12 mass fraction of w w = m /m
B B B
(8-12) substance B
where m is the mass
fr fraction (f)
(ISO 80000-4:2006, item 4-1) of
massique du
substance B and m is the total
constituant B
mass of the mixture
9-13 amount-of- c c = n /V In chemistry, the name
B B B
(8-13) substance “amount-of-substance
where n is the amount of
concentration concentration” is generally
substance (item 9-1) of B and V is
of B abbreviated to the single word
the volume (ISO 80000-3:2006,
fr concentration (f) “concentration”, it being
item 3-4) of the solution
en quantité de assumed that the adjective
matière du “amount-of-substance” is
constituant B intended. For this reason,
however, the word “mass”
should never be omitted from
the name “mass
concentration” in 9-11.2.
The standard concentration,
3 −e
1 mol/dm , is denoted c .
9-14 amount-of- x , y x = n /n For condensed phases, x is
B B B B B
(8-14.1) substance used, and for gaseous
where n is the amount of
fraction of B, mixtures y may be used.
substance (item 9-1) of B and n is
(mole fraction of
the total amount of substance (item The unsystematic name “mole
substance B)
9-1) in the mixture fraction” is still used. However,
fr fraction (f)
the use of this name is
molaire du
deprecated.
constituant B
For this quantity, the entity
used to define the amount of
substance should always be a
single molecule for every
species in the mixture.
8 ISO 2009 – All rights reserved
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SIST EN ISO 80000-9:2013
ISO 80000-9:2009(E)
UNITS PHYSICAL CHEMISTRY AND MOLECULAR PHYSICS
Inter-
Item No. Name national Definition Conversion factors and remarks
symbol
9-11.a kilogram per cubic kg/m
metre
3 3
9-11.b gram per litre g/l 1 g/l = 1 g/dm = 1 kg/m
9-12.a one 1 See the Introduction, 0.3.2.
9-13.a mole per cubic mol/m
metre
3 3 3
9-13.b mole per litre mol/l 1 mol/l = 1 mol/dm = 10 mol/m
9-14.a one 1 See the Introduction, 0.3.2.
(continued)
ISO 2009 – All rights reserved 9
---------------------- Page: 23 ----------------------
SIST EN ISO 80000-9:2013
ISO 80000-9:2009(E)
PHYSICAL CHEMISTRY AND MO
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