Quantities and units - Part 5: Thermodynamics (ISO 80000-5:2007)

ISO 80000-5:2007 gives names, symbols and definitions for quantities and units of thermodynamics. Where appropriate, conversion factors are also given.

Größen und Einheiten - Teil 5: Thermodynamik (ISO 80000-5:2007)

ISO 80000-5 enthält Benennungen, Formelzeichen und Definitionen für Größen und Einheiten der Thermo-dynamik. Wo benötigt, sind auch Umrechnungsfaktoren aufgeführt.

Grandeurs et unités - Partie 5: Thermodynamique (ISO 80000-5:2007)

L'ISO 80000-5:2007 donne les noms, les symboles et les définitions des grandeurs et unités de la thermodynamique. Des facteurs de conversion sont également indiqués, s'il y a lieu.

Veličine in enote - 5. del: Termodinamika (ISO 80000-5:2007)

Standard ISO 80000-5:2007 podaja imena, simbole in definicije za veličine in enote s področja termodinamike. 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Withdrawn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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Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN ISO 80000-5:2013
01-junij-2013
1DGRPHãþD
SIST ISO 31-4+A1:2007
9HOLþLQHLQHQRWHGHO7HUPRGLQDPLND ,62
Quantities and units - Part 5: Thermodynamics (ISO 80000-5:2007)
Größen und Einheiten - Teil 5: Thermodynamik (ISO 80000-5:2007)
Grandeurs et unités - Partie 5: Thermodynamique (ISO 80000-5:2007)
Ta slovenski standard je istoveten z: EN ISO 80000-5:2013
ICS:
01.060 9HOLþLQHLQHQRWH Quantities and units
17.200.01 Termodinamika na splošno Thermodynamics in general
SIST EN ISO 80000-5:2013 en

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

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SIST EN ISO 80000-5:2013
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SIST EN ISO 80000-5:2013
EUROPEAN STANDARD
EN ISO 80000-5
NORME EUROPÉENNE
EUROPÄISCHE NORM
April 2013
ICS 01.060
English Version
Quantities and units - Part 5: Thermodynamics (ISO 80000-
5:2007)

Grandeurs et unités - Partie 5: Thermodynamique (ISO Größen und Einheiten - Teil 5: Thermodynamik (ISO

80000-5:2007) 80000-5:2007)
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 80000-5:2013: E

worldwide for CEN national Members.
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SIST EN ISO 80000-5:2013
EN ISO 80000-5:2013 (E)
Contents Page

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

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SIST EN ISO 80000-5:2013
EN ISO 80000-5:2013 (E)
Foreword

The text of ISO 80000-5:2007 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 80000-5:2013.

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 80000-5:2007 has been approved by CEN as EN ISO 80000-5:2013 without any modification.

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SIST EN ISO 80000-5:2013
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SIST EN ISO 80000-5:2013
INTERNATIONAL ISO
STANDARD 80000-5
First edition
2007-05-01
Corrected version
2011-06-01
Quantities and units —
Part 5:
Thermodynamics
Grandeurs et unités —
Partie 5: Thermodynamique
Reference number
ISO 80000-5:2007(E)
ISO 2007
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SIST EN ISO 80000-5:2013
ISO 80000-5:2007(E)
PDF disclaimer

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unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below.

COPYRIGHT PROTECTED DOCUMENT
© ISO 2007

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 2007 – All rights reserved
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SIST EN ISO 80000-5:2013
ISO 80000-5:2007(E)
Contents Page

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

0 Introduction .......................................................................................................................................... vi

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

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

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

Annex A (informative) Units based on the foot, pound, second, and some other related units ......... 20

Annex B (informative) Other non-SI units given for information, especially regarding the conversion

factors ......................................................................................................................................................... 22

ISO 2007 – All rights reserved iii
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SIST EN ISO 80000-5:2013
ISO 80000-5:2007(E)
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 80000-5 was preparHd by Technical Committee ISO/TC 12, Quantities and units, in collaboration with

IEC/TC 25, Quantities and units.

This first edition cancels and replaces ISO 31-4:1992 and ISO 31-4:1992/Amd.1:1998. The major technical

changes from the previous standards are the following:
— the presentation of numerical statements has been changed;
— the normative references have been changed;

— some quantities concerning moisture have been added at the end of the list of quantities.

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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SIST EN ISO 80000-5:2013
ISO 80000-5:2007(E)

This corrected version of ISO 80000-5:2007 incorporates the following corrections.

— Foreword The titles of ISO/TC 12 and IEC/TC 25 have been updated.
— Footnotes 1) to 5) The footnotes have been deleted.
— Clause 2 The references have been updated.
— 5-2 (Definition) “T := 275,15 K” has been changed to “T := 273,15 K”.
0 0

— 5-2.a (Conversion factors and remarks) ISO 31-0:1992, 3.4 has been changed to ISO 80000-1:2009,

7.1.4.
— 5-14 (Symbol) α has been changed to a.
— 5-14 (Definition) α has been changed to a.
— 5-16.1 (Remarks) ISO 31-8:1992 has been changed to ISO 80000-9:2009.
— 5-19 (Remarks) ISO 31-8:1992 has been changed to ISO 80000-9:2009.
— 5-21.a (International Symbol) K has been changed to kg.
ISO 2007 – All rights reserved v
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ISO 80000-5:2007(E)
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 (8 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

is recommended; decimal multiples and submultiples formed with the SI prefixes are recommended even

though not explicitly mentioned.
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ISO 80000-5:2007(E)

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 given for information, especially regarding the conversion factors, are given in another

informative annex.

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 a

represents the standard uncertainty (estimated standard deviation) in the last digits of . 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 pr obability determined by the standard

uncertainty 0,000 32 m and the normal probability distribution of the values of l.

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SIST EN ISO 80000-5:2013
INTERNATIONAL STANDARD ISO 80000-5:2007(E)
Quantities and units —
Part 5:
Thermodynamics
1Scope

ISO80000-5 gives names, symbols and definitions for quantities and units of thermodynamics. 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 80000-1:2009, Quantities and units — Part 1: General
ISO 80000-3:2006, Quantities and units — Part 3: Space and time
ISO 80000-4:2006, Quantities and units — Part 4: Mechanics

ISO 80000-9:2009, Quantities and units — Part 9: Physical chemistry and molecular physics

3 Names, symbols, and definitions

The names, symbols, and definitions for quantities and units of thermodynamics are given on the following

pages.
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ISO 80000-5:2007(E)
THERMODYNAMICS QUANTITIES
Item No. Name Symbol Definition Remarks

5-1 thermodynamic T , (Θ) one of the base quantities in the Thermodynamic temperature is

(4-1) temperature International System of the quantity that is measured with
fr température (f) Quantities, ISQ, on which the a primary thermometer,
thermo- International System of Units, examples of which are constant
dynamique SI, is based volume gas thermometers,
acoustic thermometers, or total
radiation thermometers.
5-2 Celsius t, ϑ t = T − T The thermodynamic temperature
(4-2) temperature T is exactly 0,01 K below the
where T is thermodynamic
fr température (f) thermodynamic temperature of
temperature (item 5-1) and
Celsius the triple point of water.
T := 273,15 K
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SIST EN ISO 80000-5:2013
ISO 80000-5:2007(E)
UNITS THERMODYNAMICS
Inter-
Conversion factors and
Item No. Name national Definition
remarks
symbol
5-1.a kelvin K unit of thermodynamic The units of thermodynamic and
temperature that is the fraction Celsius temperature difference or
1/273,16 of the thermodynamic change are identical. Such
temperature of the triple point of differences or changes may be
water expressed either in kelvins,
symbol K, or in degrees Celsius,
symbol, C.
◦ It should be noted that the
5-2.a degree Celsius C special name for the kelvin for
symbol C for the degree Celsius
use
...

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