Goldbook title
IUPAC > Gold Book > alphabetical index > F > fractional change of a quantity
Gold G Icon
Indexes Download

fractional change of a quantity

A term which may be expressed infinitesimally at time t by the differential d Q t Q t. For a finite time interval the quotient is
Δ Q t 1 t 2 Q t 1 = Q t 2 − Q t 1 Q t 1
The quantities Q t 1 and Q t 2 are of the same kind and have the same type of component. Fractional change has dimension one. Examples are: mass fractional change, d m t m t; amount of substance fractional change, d n t n t.
PAC, 1992, 64, 1569 (Quantities and units for metabolic processes as a function of time (IUPAC Recommendations 1992)) on page 1571
Interactive Link Maps
First Level Second Level Third Level
Cite as:
IUPAC. Compendium of Chemical Terminology, 2nd ed. (the "Gold Book"). Compiled by A. D. McNaught and A. Wilkinson. Blackwell Scientific Publications, Oxford (1997). XML on-line corrected version: (2006-) created by M. Nic, J. Jirat, B. Kosata; updates compiled by A. Jenkins. ISBN 0-9678550-9-8.
Last update: 2014-02-24; version: 2.3.3.
DOI of this term:
Original PDF version: The PDF version is out of date and is provided for reference purposes only. For some entries, the PDF version may be unavailable.
Current PDF version | Version for print | History of this term